couchbase_at_the_hut_group_couchbase_uk_2013

THE HUT GROUP + COUCHBASE

Chris Woods - Architect

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EAbout

About Me

Name: Chris Woods

Role: Architect

Contact: chris.woods@thehutgroup.com

@chriswoods1983

About The Hut Group

The Hut Group is the UK’s leading multi-website online retailer with operations

in the women's fashion, health & beauty, entertainment and gifts market. The

group has also firmly established itself in multiple international markets, with

35% of current sales coming from outside the UK.

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EProblem

Problem

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EBackground

Session State• Server bound: Whenever we deployed our existing application, all

the customers currently on the site get kicked out of the ”checkout

flow”, making it costly to release and consequently restricts when

and how often you can release. • No Resiliency: If the server you are bound to via sticky session

goes down customer gets kicked out of checkout.

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EThe Solution

Requirements • Performance: Be capable of supporting 4,000 concurrent sessions per min

at a sustained rate during “peak”.• Server Affinity: Should be able to release the system at any time of day and

not affect the user experience.• Scalability: Grows with the company - can be expanded to support 1,000 to

10,000 times more traffic.

• Resiliency: Can be scaled across multiple data centres in multiple physical locations.

• Resiliency: A failure should not cause downtime.

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EThe Contenders

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EWhy Couchbase

• Performance.• Resiliency.• Schemaless.• Simplicity.• Cost.

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E

The Hard Stuff

Aggregate Document

{“checkoutOrder”: { "orderNumber": "27162500", "customer": { "customerId": 5830953, "email": "chris@chriswoods.me.uk", "customerName": "mr c woods", }, "basket": { "basketItems": [{ "productTitle": "Apple iPad Mini: 64GB Wifi - White and Silver", "quantity": 1, "itemPrice": { "money": { "amount": 419.99, "currency": "GBP“ } }, }, “shipping”:{etc…}, “delivery”:{etc…}, etc… }}

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EUpdate Consistency Issues

2, On receiving change of address request the

application:-

2a, Request Delivery Options

2b, Check Shipping Restrictions

1, Customer changes address

3, Restrictions return then the thread loads the document modifies it

and saves it

4, Delivery options

return then the thread loads the document modifies it

and saves itCAS:1 CAS:1

ONE WILL FAIL !

Shipability Service

DeliveryService

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ESeparate Aggregates

{“delivery”:{}} {“shipping”:{}}

{“checkoutOrder”: { "orderNumber": "27162500", "customer": { "customerId": 5830953, "email": "chris@chriswoods.me.uk", "customerName": "mr c woods", }, "basket": { "basketItems": [{ "productTitle": "Apple iPad Mini: 64GB Wifi - White and Silver", "quantity": 1, "itemPrice": { "money": { "amount": 419.99, "currency": "GBP“ } }, },etc… }}

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ESchema Migrations in a Schemaless data model

V 2.0

Version 2.0 Version 2.0 Version 1.0Version 2.0

V 2.0V 1.0

V 1.0

1.2. 3.

4.

?

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ESuccess

• Released on 2nd July

• Passed Christmas with flying colours

• Very few CAS errors

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New Stuff

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ECouchbase 2.0 and Elastic Search for product search

Existing infrastructure

Jar + Cron Job

Data

Solr Master

Solr Slaves

Product update

Search

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ECouchbase 2.0 and Elastic Search for product search

Product update

Search/findBy(Query criteria)

XDRC

Summary

Summary

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EQuestions

?