Thank yo uBob - looks interesting. We are: [root@ny7blade01 ~]# uname -a Linux ny7blade01 2.6.32-131.17.1.el6.x86_64 #1 SMP Thu Sep 29 10:24:25 EDT 2011 x86_64 x86_64 x86_64 GNU/Linux That bug looks limited to RHEL 5.x - would it affect us? On 11/16/2011 11:57 AM, Bob Peterson wrote: > ----- Original Message ----- > | Hello - > | > | We are experiencing extreme I/O slowness on a gfs2 volume on a SAN. > | > | We have a: > | > | Netezza TF24 > | IBM V7000 SAN > | IBM Bladecenter with 3 HS22 blades > | Stand alone HP DL380 G7 server > | > | > | The 3 blades and the HP DL380 are clustered using RHEL 6.1 and > | clustersuite 5.5. > | > | We have 2 clustered volumes on different storage pools (one has 10k > | drives the other 7.2k). > | > | We have an internal test that reads a large file (950G) using fopen > | and > | memmap. On a standalone server in a datacenter (Ubuntu Raid 5 10k > | disks) > | the tests take approximately 75seconds to run. > | > | On the blades the test takes 300 - 350 seconds. > | > | I have been looking at the cluster conf; any gfs tuning I can find. I > | am > | not really sure what I should post here? > | > | yrs > | > | Michael > | > | -- > | > | > | Michael Bubb > | System Administrator > Hi Michael, > > It sounds like you probably ran into our "Large File Allocate" bug. > This is solved in recent kernels, including 5.7.z, 5.8, 6.3, etc. > More info here: > > https://bugzilla.redhat.com/show_bug.cgi?id=683155 > > Regards, > > Bob Peterson > Red Hat File Systems > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster -- Michael Bubb System Administrator .................................................. T: +1.646.380-2738 | C: +1.646.783.8769 mbubb@xxxxxxxxxxxxxx | michael.bubb@xxxxxxxxx .................................................. Collective | collective.com | Twitter: @collectivesays 99 Park Ave. 5th Floor | New York, NY 10016 | +1.888.460.9513 ..................................................
Attachment:
signature.asc
Description: OpenPGP digital signature
-- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
