I have been doing some experimenting and I found something I do not understand and it may have something to do with this problem. I recently took node that when the iscsi disks are running slow I am missing a process, specifically: /usr/sbin/iscsid.
It starts out that iscsi is running slow, I take a look and see what iscsi is doing... r...@mara:~# ps -ef | grep scsi root 1493 2 0 2008 ? 00:00:00 [scsi_eh_0] root 2433 2 0 2008 ? 00:00:00 [scsi_eh_1] root 2434 2 0 2008 ? 00:00:00 [scsi_eh_2] root 5138 2 0 2008 ? 00:00:00 [scsi_eh_3] root 5139 2 0 2008 ? 00:23:42 [scsi_wq_3] root 26621 26468 0 12:13 pts/0 00:00:00 grep scsi root 27919 1 0 Jan05 ? 00:00:00 /sbin/iscsid I do my usually parlor trick to get it running at proper speed again: r...@mara:~# dpkg -i /home/apthul/open-iscsi_2.0.730-1_amd64.deb ; aptitude install open-iscsi dpkg - warning: downgrading open-iscsi from 2.0.865-1ubuntu3 to 2.0.730-1. (Reading database ... 27321 files and directories currently installed.) Preparing to replace open-iscsi 2.0.865-1ubuntu3 (using .../open-iscsi_2.0.730-1_amd64.deb) ... * Disconnecting iSCSI targets ...done. * Stopping iSCSI initiator service ...done. Unpacking replacement open-iscsi ... Setting up open-iscsi (2.0.730-1) ... Installing new version of config file /etc/init.d/open-iscsi ... * Starting iSCSI initiator service iscsid ...done. * Setting up iSCSI targets ...done. Preparing to replace open-iscsi 2.0.730-1 (using .../open-iscsi_2.0.865-1ubuntu3_amd64.deb) ... * Disconnecting iSCSI targets ...done. * Stopping iSCSI initiator service ...done. Unpacking replacement open-iscsi ... Setting up open-iscsi (2.0.865-1ubuntu3) ... Installing new version of config file /etc/init.d/open-iscsi ... update-rc.d: /etc/init.d/remove: file does not exist * Starting iSCSI initiator service iscsid ...done. * Setting up iSCSI targets Everything test out well and I decide I wanted to see what was running now: apt...@mara:~$ ps -ef | grep scsi root 1493 2 0 2008 ? 00:00:00 [scsi_eh_0] root 2433 2 0 2008 ? 00:00:00 [scsi_eh_1] root 2434 2 0 2008 ? 00:00:00 [scsi_eh_2] root 5138 2 0 2008 ? 00:00:00 [scsi_eh_3] root 5139 2 0 2008 ? 00:23:42 [scsi_wq_3] root 26742 1 0 12:13 ? 00:00:00 /usr/sbin/iscsid ##What the heck is that!??? root 26960 1 0 12:13 ? 00:00:00 /sbin/iscsid root 26961 1 0 12:13 ? 00:00:00 /sbin/iscsid apthul 27018 22441 0 12:16 pts/0 00:00:00 grep scsi apt...@mara:~$ iostat -cdmtx 10 999999 I decided to go see what it was: apt...@mara:~$ ls -latr /usr/sbin/iscsid ls: cannot access /usr/sbin/iscsid: No such file or directory It is not there but /usr/sbin/iscsid is still running, it must have been deleted from the open-scsi upgrade. Could this be the magic that is keeping my open-iscsi running at proper speeds? Could it be that /usr/sbin/iscsid running is causing libraries to not be reloaded that are keeping the open-iscsi running properly? -- open-iscsi slow disk performance https://bugs.launchpad.net/bugs/305853 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to open-iscsi in ubuntu. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
