On 10/15/13 3:45 PM, Mike Jensen wrote: > Hi Group - 1^st time post, looks like just use the email address I have seen from other posts > > If the setup/info/questions below are not suitable for this list, is there another xfs list available for these?? > User questions are appropriate here, but since this is a Red Hat distro kernel, not upstream, it's probably better to engage Red Hat for information on optimal tuning of something like this. -Eric > > Thanks > > mike > > > > Configuration – > > > > - RH 6.4 on HP G8 server w/16GB mem (could add a lot more) > > - 12Gb SAS connections (2) to storage > > - Storage > > - 96 LFF HDD’s (4TB 7K NLSAS) presently organized as 8 x 10+2 R6 raidsets > > - 8 volumes mapped to host ports (MPIO engaged) > > - Mdadm used to stripe (/dev/dm*) LUNs into a single md device (approx. 300+TB file system space) > > - Mkfs.xfs used to lay down file system > > - > > - Workload > > - Application creates file of specified length in dir of mount point, IO’s then issued to file(s), each file receives 1 stream of IO > > - 1 x high speed stream 1000MB/s Seq W (IO’s arrive as 512KB -=> 4MB frame would be 8 x 512KB IO’s) > > - 2 x med-speed streams 200MB/s Seq W “ > > - 30-50 low speed streams 10MB/s Seq W “ > > > > Objectives/Questions – > > > > - Would like to optimize xfs/mount parameters to make maximal use of storage assets > > - Thinking of using 15K HDD R1 set for log files – would this get all/most of metadata or just a subset? Right now seeing metadata writes arriving with data writes and want to peel them off the 7K HDD’s > > - Would using sub-directories for each file ensure that each subdir/file would be in it’s own alloc group? And that would keep the streaming data in a separate AG – could help the storage more efficiently destage the writes from cache to disk > > > > > > _______________________________________________ > xfs mailing list > xfs@xxxxxxxxxxx > http://oss.sgi.com/mailman/listinfo/xfs > _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
