1 .The first step to
Multi AZ architecture for
Apache BookKeeper
(Durability and availability across zones!)
Anup Ghatage
Salesforce | Senior Member of Technical Staff
Ankit Jain
Salesforce | Senior Member of Technical Staff
2 . Anup Ghatage Ankit Jain
Salesforce Salesforce
Carnegie Mellon University Carnegie Mellon University
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4 .BookKeeper Basics
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6 . What is a cookie? Zookeeper
● It’s the identity of the Bookie-0 Bookie-1 Bookie-2
Cookie
Cookie
Cookie
InstanceID: InstanceID: InstanceID:
bookie in the cluster abc123 abc123 abc123
ledgerDir=/tmp ledgerDir=/tmp ledgerDir=/tmp
journalDir=/tmp journalDir=/tmp journalDir=/tmp
● Created when bookies
are started
● Used to verify cluster Bookie-0 Bookie-1 Bookie-2
membership and state of
data in the bookie
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8 .Why do we need a
Multi AZ Architecture anyway?
9 . “The cloud is just a computer in Reston with a “The Azure cloud has experienced three unique
and significant incidents that impacted
bad power supply”
customers.”
“The problem for those sites that were brought
down by the AWS outage is sites’ own failure “Savor “Fireplace For Your Home” on Christmas,
to implement the one key design principle of rated four out of five stars and featuring “famous
the cloud — design with failure in mind. ” old-fashioned, wood-burning fireplace, ”
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11 .Our design
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14 . Bookie-0
Bookie-0
InstanceID: abc123
Cookie InstanceID: abc123
Cookie
ledgerDir=/tmp
ledgerDir=/tmp
journalDir=/tmp
journalDir=/tmp
networkLocation=
/region+zone/upgradeDomain
Region West US us-west us-west1
AZ az1 2a a
Kubernetes
Azure AWS GCP
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