Read this: http://hortonworks.com/blog/introduction-to-hbase-mean-time-to-recover-mttr/
There are some jira ticket links in there that will give you more reading material on MTTR. --Suraj On Tue, Jun 11, 2013 at 2:19 AM, Pankaj Misra <[email protected]>wrote: > Hi, > > > > We are using 0.94.6.1 version of HBase and are planning for high > availability testing. While the entire scheme to enable the cluster to be > highly available is clear, I wanted to get some idea about HBase Service > lifetime in terms of Mean-Time to Failure and Time of Recovery in cases of > failure. Any historic evidences will also help, as it will be vital for us > to calculate the actual availability of the system across an year. > > > > While I understand that HBase provides more of active/passive mode of > seamless high availability of Masters, but any failure, will impact the > performance to some extent and this calculation will help in deriving the > actual number of nodes that we should consider without compromising on the > performance as well, while the system is available. > > > > The article below from HBase wiki indicates that the Master switching > takes a couple of seconds to happen but I think the volume of data, replay > logs and the region availability will also play a key role in order to make > the switch complete, and hence would request guidance around the complete > mechanism and recovery time. > > http://wiki.apache.org/hadoop/Hbase/MultipleMasters > > > > Any ideas/facts would be very helpful . > > > Thanks & Regards > Pankaj Misra > > > ________________________________ > > > > > > > NOTE: This message may contain information that is confidential, > proprietary, privileged or otherwise protected by law. The message is > intended solely for the named addressee. If received in error, please > destroy and notify the sender. Any use of this email is prohibited when > received in error. Impetus does not represent, warrant and/or guarantee, > that the integrity of this communication has been maintained nor that the > communication is free of errors, virus, interception or interference. >
