Hi, I understand that this may not be a 100% related question to the forum (perhaps it's more Lucene than Solr) but perhaps someone here has seen similar things...
I'm experimenting on Amazon Ec2 with indexing a solr / lucene index on a striped (Raid 0) partition. While searching gives good benefits of using a single harddisk I see no improvement is indexing over a single disk. Now I'm not at all a linux-guru but doing basic random write / read io-testing with bonnie+ leads me to conclude that the raid is properly setup, and is performing good. I'm running Ubuntu 8.0.4 / Mdadm as software raid / Xfs as file system btw. The data i'm creating is very index heavy, e.g: over 1000 indices. Would this be a reason for not seeing better performance with indexing than on a single disk? I'm guessing here: perhaps creating / shifting / altering the indices after each insert creates such a load between physical disks that the normal write scenario (of software raid 0) of writing sequential chunks in round-robin fashion to all the disks in the array no longer holds? Does this seem logical or does someone know another reason? Thanks, Britske -- View this message in context: http://www.nabble.com/solr-on-raid-0---%3E-no-performance-gain-while-indexing--tp20002623p20002623.html Sent from the Solr - User mailing list archive at Nabble.com.
