On Mon, 25 Jun 2012 10:43:36 -0500 Brian Schaefer <brian.schaefer@xxxxxxxxx> wrote: > Team, > > I'm trying to stabilize my homebrew iSCSI server that I'm using as a > ESX datastore. Under heavy usage, i see the following behavior: > > Jun 25 10:00:17 fileserver tgtd: abort_task_set(1150) found 177db9 0 > [message repeats ~100 times, increasing the found hex address] > Jun 25 10:00:20 fileserver tgtd: conn_close(101) connection closed, 0x8cdbe8 70 > Jun 25 10:00:20 fileserver tgtd: conn_close(107) sesson 0x8cdee0 1 > Jun 25 10:00:20 fileserver tgtd: conn_close(101) connection closed, 0x8cc1f8 5 > Jun 25 10:00:20 fileserver tgtd: conn_close(107) sesson 0x8cd400 1 Sounds like the performance of your device is not enough. > I think this may be due to the fact that i'm using a /dev/loop0 > devices as the backing store: Maybe. Loopback devices degrades the performance. > default-driver iscsi > <target iqn.2012-04.com.example:vmds200> > backing-store /dev/loop0 > initiator-address 192.168.3.2 > initiator-address 192.168.3.6 > </target> > > In case it's relevant, /dev/loop0 gets created at boot (manually, > since this was supposed to be temporary anyway). It's a file i created > with DD, located on an MDADM RAID1 of 2x 2TB disks (2TB total > storage). The file itself if 500GB. Why not simply use a file for tgtd? > I'm running CentOS6 with kernel 2.6.32-220.17.1.el6.x86_64, and > scsi-target-utils-1.0.14-4.el6.x86_64. > > In order to stabilize the system, would it be better to > > a) migrate to the OSD storage type > b) migrate to real physical disks (probably another MDADM RAID1) > c) The loop device isn't the issue, I have something else messed up. > -- > > > --Brian > -- > To unsubscribe from this list: send the line "unsubscribe stgt" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
