On Sat, Aug 04, 2007 at 12:00:52AM +0100, Donald Fraser wrote: > Our company has two sites, a master and a disaster recovery site. > I am trying to assess whether data has been lost during a fail-over, due to > the asynchronous method of transporting WAL file data between sites (we use > DRBD). > > Disaster recovery node start-up log: > user= pid=9907 timestamp=[2007-08-01 17:09:51 BST] tid= LOG: record with > zero length at 0/7C62F52C > user= pid=9907 timestamp=[2007-08-01 17:09:51 BST] tid= LOG: redo done at > 0/7C62F4E8 > > My question is: given the above WAL segment information, can I use it to > decide whether information was lost in the master database site, at the point > of failure, without starting the database up?
I'm not sure, but you could try md5-ing the appropriate WAL file on the master and slave; if the files are identical then you shouldn't have lost any data... if they are then you probably have. -- Decibel!, aka Jim Nasby [EMAIL PROTECTED] EnterpriseDB http://enterprisedb.com 512.569.9461 (cell)
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