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Home > Data > Operational Intelligence > Implementing Splunk 7, Third Edition
Implementing Splunk 7, Third Edition
Implementing Splunk 7, Third Edition

Implementing Splunk 7, Third Edition: Effective operational intelligence to transform machine-generated data into valuable business insight , Third Edition

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Implementing Splunk 7, Third Edition

Understanding Search

To successfully use Splunk, it is vital that you write effective searches. Using the index efficiently will make your initial discoveries faster, and the reports you create will run faster for you and for others. In this chapter, we will cover the following topics:

  • How to write effective searches
  • How to search using fields
  • Understanding time
  • Saving and sharing searches
  • Event annotation

Using search terms effectively

The key to creating an effective search is to take advantage of the index. The Splunk index is effectively a huge word index, sliced by time. One of the most important factors for the performance of your searches is how many events are pulled from the disk. The following few key points should be committed to memory:

  • Search terms are case insensitive: Searches for error, Error, ERROR, and ErRoR are all the same.
  • Search terms are additive: Given the search item mary error, only events that contain both words will be found. There are Boolean and grouping operators to change this behavior; we will discuss these later.
  • Only the time frame specified is queried: This may seem obvious, but it's very different from a database, which would always have a single index across all events in a table. Since each index is sliced into new buckets over time...

Boolean and grouping operators

There are a few operators that you can use to refine your searches (note that these operators must be in uppercase so as not to be considered search terms):

  • AND is implied between terms. For instance, error mary (two words separated by a space) is the same as error AND mary.
  • OR allows you to specify multiple values. For instance, error OR mary means find any event that contains either word.
  • NOT applies to the next term or group. For example, error NOT mary would find events that contain error but do not contain mary.
  • The quote marks ("") identify a phrase. For example, "Out of this world" will find this exact sequence of words. Out of this world will find any event that contains all of these words, but not necessarily in that order.
  • Parentheses ( ( ) ) are used for grouping terms. Parentheses can help avoid confusion...

Clicking to modify your search

Though you can probably figure it out by just clicking around, it is worth discussing the behavior of the GUI when moving your mouse around and clicking:

  • Clicking on any word or field value will give you the option to Add to search or Exclude from search the existing search or create a New search, as shown in the following screenshot:
  • Clicking on a word or a field value that is already in the query will give you the option to remove it from the existing query or, as previously, create a new search, as shown in the following screenshot:

Event segmentation

In prior versions of Splunk, event segmentation was configurable through a setting in the Options dialog...

Using fields to search

When we explored the GUI in Chapter 1, The Splunk Interface, you probably noticed fields everywhere. Fields appear in the field picker on the left and under every event. Where fields actually come from is transparent to the user, who simply searches for key=value. We will discuss adding new fields in Chapter 3, Tables, Charts, and Fields, and in Chapter 11, Configuring Splunk.

Using the field picker

The field picker gives us easy access to the fields (currently defined) for the results of our query. Splunk will extract some fields from event data without your help such as: host, source, and sourcetype values, timestamps, and others. Additional fields to be extracted can be defined by you. Clicking on...

Using wildcards efficiently

Though the index is based on words, it is possible to use wildcards when necessary, albeit a little carefully. Take a look at some interesting facts about wildcards:

  • Only trailing wildcards are efficient: Stated simply, bob* will find events containing Bobby efficiently, but *by or *ob* will not. The latter cases will scan all events in the time frame specified.
  • Wildcards are tested last: Wildcards are tested after all other terms. Given the search authclass *ob* hello world, all other terms besides *ob* will be searched first. The more you can limit the results using full words and fields, the better your search will perform.

Supplementing wildcards in fields

Given the following events,...

All about time

Time is an important and confusing topic in Splunk. If you want to skip this section, absorb one concept: time must be parsed properly on the way into the index, as it cannot be changed later without indexing the raw data again.

How Splunk parses time

Given the date 11-03-04, how would you interpret this date? Your answer probably depends on where you live. In the United States, you would probably read this as November 3, 2004. In Europe, you would probably read this as March 11, 2004. It would also be reasonable to read this as March 4, 2011.

Luckily, most dates are not this ambiguous, and Splunk makes a good effort to find and extract them, but it is absolutely worth the trouble to give Splunk a little help...

Making searches faster

We have talked about using the index to make searches faster. When starting a new investigation, following a few steps will help you get results faster:

  1. Set the time to the minimum time that you believe will be required to locate relevant events. For a chatty log, this may be as little as a minute. If you don't know when the events occurred, you might search a larger time frame and then zoom in by clicking on the timeline while the search is running.
  2. Specify the index if you have multiple indexes. It's good to get into the habit of starting your queries with the index name. For example, index=myapplicationindex error bob.
  3. Specify other fields that are relevant. The most common fields to specify are sourcetype and host. For example, index=myapplicationindex sourcetype="impl_splunk_gen" error bob. If you find yourself specifying the field...

Using search terms effectively

The key to creating an effective search is to take advantage of the index. The Splunk index is effectively a huge word index, sliced by time. One of the most important factors for the performance of your searches is how many events are pulled from the disk. The following few key points should be committed to memory:

  • Search terms are case insensitive: Searches for error, Error, ERROR, and ErRoR are all the same.
  • Search terms are additive: Given the search item mary error, only events that contain both words will be found. There are Boolean and grouping operators to change this behavior; we will discuss these later.
  • Only the time frame specified is queried: This may seem obvious, but it's very different from a database, which would always have a single index across all events in a table. Since each index is sliced into new buckets over time, only the buckets that contain events for the time frame in question need to be queried.
  • Search terms are words, including parts...

Boolean and grouping operators

There are a few operators that you can use to refine your searches (note that these operators must be in uppercase so as not to be considered search terms):

  • AND is implied between terms. For instance, error mary (two words separated by a space) is the same as error AND mary.
  • OR allows you to specify multiple values. For instance, error OR mary means find any event that contains either word.
  • NOT applies to the next term or group. For example, error NOT mary would find events that contain error but do not contain mary.
  • The quote marks ("") identify a phrase. For example, "Out of this world" will find this exact sequence of words. Out of this world will find any event that contains all of these words, but not necessarily in that order.
  • Parentheses ( ( ) ) are used for grouping terms. Parentheses can help avoid confusion in logic. For instance, these two statements are equivalent:
    • bob error OR warn NOT debug
    • (bob AND (error OR warn)) AND NOT debug
  • The equal sign (=) is...

Clicking to modify your search

Though you can probably figure it out by just clicking around, it is worth discussing the behavior of the GUI when moving your mouse around and clicking:

  • Clicking on any word or field value will give you the option to Add to search or Exclude from search the existing search or create a New search, as shown in the following screenshot:
  • Clicking on a word or a field value that is already in the query will give you the option to remove it from the existing query or, as previously, create a new search, as shown in the following screenshot:

Event segmentation

In prior versions of Splunk, event segmentation was configurable through a setting in the Options dialog. In version 6.2, the options dialog is not present; although segmentation (discussed later in this chapter) is still an important concept, it is not accessible through the web interface/options dialog in this version.

Field widgets

Clicking on values in the Select Fields dialog (the field picker) or in the field...

Using fields to search

When we explored the GUI in Chapter 1, The Splunk Interface, you probably noticed fields everywhere. Fields appear in the field picker on the left and under every event. Where fields actually come from is transparent to the user, who simply searches for key=value. We will discuss adding new fields in Chapter 3, Tables, Charts, and Fields, and in Chapter 11, Configuring Splunk.

Using the field picker

The field picker gives us easy access to the fields (currently defined) for the results of our query. Splunk will extract some fields from event data without your help such as: host, source, and sourcetype values, timestamps, and others. Additional fields to be extracted can be defined by you. Clicking on any field presents us with the details about that field in our current search results:

As we go through the following items in this widget, we see a wealth of information right away:

  • N Value, X% of events is a good indication of whether we are getting the results we think...

Using wildcards efficiently

Though the index is based on words, it is possible to use wildcards when necessary, albeit a little carefully. Take a look at some interesting facts about wildcards:

  • Only trailing wildcards are efficient: Stated simply, bob* will find events containing Bobby efficiently, but *by or *ob* will not. The latter cases will scan all events in the time frame specified.
  • Wildcards are tested last: Wildcards are tested after all other terms. Given the search authclass *ob* hello world, all other terms besides *ob* will be searched first. The more you can limit the results using full words and fields, the better your search will perform.

Supplementing wildcards in fields

Given the following events, a search for world would return both events:

2012-02-07T01:04:31.102-0600 INFO AuthClass Hello world. [user=Bobby, ip=1.2.3.3] 
2012-02-07T01:23:34.204-0600 INFO BarClass Goodbye. [user=Bobby, ip=1.2.3.3, message="Out of this world"]

What if you only wanted the second event but all...

All about time

Time is an important and confusing topic in Splunk. If you want to skip this section, absorb one concept: time must be parsed properly on the way into the index, as it cannot be changed later without indexing the raw data again.

How Splunk parses time

Given the date 11-03-04, how would you interpret this date? Your answer probably depends on where you live. In the United States, you would probably read this as November 3, 2004. In Europe, you would probably read this as March 11, 2004. It would also be reasonable to read this as March 4, 2011.

Luckily, most dates are not this ambiguous, and Splunk makes a good effort to find and extract them, but it is absolutely worth the trouble to give Splunk a little help by configuring the time format. We'll discuss the relevant configurations in Chapter 11, Configuring Splunk.

How Splunk stores time

Once the date is parsed, the date stored in Splunk is always stored as a GMT epoch. Epoch time is the number of seconds since January 1, 1970...

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Key benefits

  • Enrich machine-generated data and transform it into useful, meaningful insights
  • Perform search operations and configurations, build dashboards, and manage logs
  • Extend Splunk services with scripts and advanced configurations to process optimal results

Description

Splunk is the leading platform that fosters an efficient methodology and delivers ways to search, monitor, and analyze growing amounts of big data. This book will allow you to implement new services and utilize them to quickly and efficiently process machine-generated big data. We introduce you to all the new features, improvements, and offerings of Splunk 7. We cover the new modules of Splunk: Splunk Cloud and the Machine Learning Toolkit to ease data usage. Furthermore, you will learn to use search terms effectively with Boolean and grouping operators. You will learn not only how to modify your search to make your searches fast but also how to use wildcards efficiently. Later you will learn how to use stats to aggregate values, a chart to turn data, and a time chart to show values over time; you'll also work with fields and chart enhancements and learn how to create a data model with faster data model acceleration. Once this is done, you will learn about XML Dashboards, working with apps, building advanced dashboards, configuring and extending Splunk, advanced deployments, and more. Finally, we teach you how to use the Machine Learning Toolkit and best practices and tips to help you implement Splunk services effectively and efficiently. By the end of this book, you will have learned about the Splunk software as a whole and implemented Splunk services in your tasks at projects

Who is this book for?

This book is intended for data analysts, business analysts, and IT administrators who want to make the best use of big data, operational intelligence, log management, and monitoring within their organization. Some knowledge of Splunk services will help you get the most out of the book

What you will learn

  • Focus on the new features of the latest version of Splunk Enterprise 7
  • Master the new offerings in Splunk: Splunk Cloud and the Machine Learning Toolkit
  • Create efficient and effective searches within the organization
  • Master the use of Splunk tables, charts, and graph enhancements
  • Use Splunk data models and pivots with faster data model acceleration
  • Master all aspects of Splunk XML dashboards with hands-on
  • applications
  • Create and deploy advanced Splunk dashboards to share valuable business insights with peers
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Publication date : Mar 29, 2018
Length: 576 pages
Edition : 3rd
Language : English
ISBN-13 : 9781788836289
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Splunk
Category :
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Languages :
XML
Concepts :
Operational Intelligence
Tools :
Splunk

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Publication date : Mar 29, 2018
Length: 576 pages
Edition : 3rd
Language : English
ISBN-13 : 9781788836289
Vendor :
Splunk
Category :
Data
Languages :
XML
Concepts :
Operational Intelligence
Tools :
Splunk

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Table of Contents

14 Chapters
The Splunk Interface Chevron down icon Chevron up icon
The Splunk Interface
Logging in to Splunk
The home app
The top bar
The Search & Reporting app
Using the time picker
Using the field picker
The settings section
Splunk Cloud
Try before you buy
A quick cloud tour
The top bar in Splunk Cloud
Splunk reference app – PAS
Universal forwarder
eventgen
Next steps
Summary
Understanding Search Chevron down icon Chevron up icon
Understanding Search
Using search terms effectively
Boolean and grouping operators
Clicking to modify your search
Using fields to search
Using wildcards efficiently
All about time
Making searches faster
Sharing results with others
Searching job settings
Saving searches for reuse
Creating alerts from searches
Event annotations
Summary
Tables, Charts, and Fields Chevron down icon Chevron up icon
Tables, Charts, and Fields
About the pipe symbol
Using top to show common field values
Using stats to aggregate values
Using chart to turn data
Using timechart to show values over time
Working with fields
Chart enhancements in version 7.0
Summary
Data Models and Pivots Chevron down icon Chevron up icon
Data Models and Pivots
What is a data model?
What does a data model search?
Acceleration in version 7.0
Creating a data model
Lookup attributes
What is a pivot?
A quick example
Sparklines
Summary
Simple XML Dashboards Chevron down icon Chevron up icon
Simple XML Dashboards
The purpose of dashboards
Using wizards to build dashboards
Converting the panel to a report
Back to the dashboard
Editing XML directly
UI examples app
Building forms
Features replaced
Autorun dashboard
Scheduling the generation of dashboards
Summary
Advanced Search Examples Chevron down icon Chevron up icon
Advanced Search Examples
Using subsearches to find loosely related events
Using transaction
Determining concurrency
Calculating events per slice of time
Rebuilding top
Acceleration
Version 7.0 advancements in metrics
Summary
Extending Search Chevron down icon Chevron up icon
Extending Search
Using tags to simplify search
Using event types to categorize results
Using lookups to enrich data
Using macros to reuse logic
Creating workflow actions
Using external commands
Summary
Working with Apps Chevron down icon Chevron up icon
Working with Apps
Defining an app
Included apps
Installing apps
Building your first app
Editing navigation
Customizing the appearance of your app
Object permissions
App directory structure
Self-service app management
Summary
Building Advanced Dashboards Chevron down icon Chevron up icon
Building Advanced Dashboards
Reasons for working with advanced XML
Reasons for not working with advanced XML
Development process
Advanced XML structure
Converting simple XML to advanced XML
Module logic flow
Understanding layoutPanel
Reusing a query
Using intentions
Creating a custom drilldown
Third-party add-ons
Summary
Summary Indexes and CSV Files Chevron down icon Chevron up icon
Summary Indexes and CSV Files
Understanding summary indexes
When to use a summary index
When to not use a summary index
Populating summary indexes with saved searches
Using summary index events in a query
Using sistats, sitop, and sitimechart
How latency affects summary queries
How and when to backfill summary data
Reducing summary index size
Calculating top for a large time frame
Using CSV files to store transient data
Summary
Configuring Splunk Chevron down icon Chevron up icon
Configuring Splunk
Locating Splunk configuration files
The structure of a Splunk configuration file
The configuration merging logic
An overview of Splunk.conf files
User interface resources
Summary
Advanced Deployments Chevron down icon Chevron up icon
Advanced Deployments
Planning your installation
Splunk instance types
Common data sources
Sizing indexers
Planning redundancy
Working with multiple indexes
Deploying the Splunk binary
Using apps to organize configuration
Configuration distribution
Using LDAP for authentication
Using single sign-on
Load balancers and Splunk
Multiple search heads
Summary
Extending Splunk Chevron down icon Chevron up icon
Extending Splunk
Writing a scripted input to gather data
Using Splunk from the command line
Querying Splunk via REST
Writing commands
Writing a scripted lookup to enrich data
Writing an event renderer
Writing a scripted alert action to process results
Hunk
Summary
Machine Learning Toolkit Chevron down icon Chevron up icon
Machine Learning Toolkit
What is machine learning?
Defining the toolkit
The toolkit workbench
Assistants
Extended SPL (search processing language)
Building a model
Validation
Summary

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Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Full star icon Full star icon 5
(4 Ratings)
5 star 100%
4 star 0%
3 star 0%
2 star 0%
1 star 0%
Pooja Autade Jun 26, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Very helpful
Amazon Verified review Amazon
Brandy Jul 25, 2018
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book will give you all of what you need as an engineer
Amazon Verified review Amazon
M. Eagles Jul 22, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Book does a good job of covering most Splunk topics.I recommend this book to anyone just getting started with Splunk.
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Gregory CHRISTINE Jun 25, 2019
Full star icon Full star icon Full star icon Full star icon Full star icon 5
hate de faire le tour
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Generative AI with LangChain
Generative AI with LangChain
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Dec 2023 368 pages
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Modern Generative AI with ChatGPT and OpenAI Models
Modern Generative AI with ChatGPT and OpenAI Models
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May 2023 286 pages
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Deep Learning with TensorFlow and Keras – 3rd edition
Deep Learning with TensorFlow and Keras – 3rd edition
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Oct 2022 698 pages
Full star icon 4.6 (45)
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Machine Learning Engineering with Python
Machine Learning Engineering with Python
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Aug 2023 462 pages
Full star icon 4.6 (36)
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What is the delivery time and cost of print book? Chevron down icon Chevron up icon

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Economy: Delivery to most addresses in the US within 10-15 business days

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Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

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Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
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Premium: Delivery to addresses in Australia only
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Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

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Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

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The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

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The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

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You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

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Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

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What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela