Re: iSCSI initiator lockups
> > --VbJkn9YxBvnuCH5J > Content-Type: text/plain; charset=us-ascii > Content-Disposition: inline > Content-Transfer-Encoding: quoted-printable > > In our last exciting episode, Danny Braniss (da...@cs.huji.ac.il) said: > > I guess it's time to fix this. > > danny > > Thank you very much for the pointer to the newer version; we have seen a=20 > marked improvement with none of the 30 second studdering. I appreciate > your rapid assistance! Good, can you send me the info of the target/s you are using to add to the list of supported targets? Cheers, danny ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: iSCSI initiator lockups
> > --ikeVEW9yuYc//A+q > Content-Type: text/plain; charset=us-ascii > Content-Disposition: inline > Content-Transfer-Encoding: quoted-printable > > I'm running into some odd headaches regarding what looks like iSCSI initiat= > ors > going to sleep for approximately 30 seconds before returning to life and > pumping a ton of information back to the target. While this is happening, > system load climbs up alarmingly fast. Looking at tcpdumps in Wireshark, it > shows what appears to be a nearly exact 30 second delay where the initiator > stops talking to the target server, then abruptly restarts. Currently > 8 machines are talking to 2 servers with 4 targets a piece, and while its= > =20 > working, we get good throughput. Activity is moderately high, as we are=20 > using the iSCSI targets as spool disks in an email cluster. As it appears > that iscsi-target is a single-threaded process, would it be valuable to > put each target in its own process on its own port? At any rate, this is > causing serious problems on the mail processing machines. > can you send me the output of sysctl net.iscsi chears, danny ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
iSCSI initiator lockups
I'm running into some odd headaches regarding what looks like iSCSI initiators going to sleep for approximately 30 seconds before returning to life and pumping a ton of information back to the target. While this is happening, system load climbs up alarmingly fast. Looking at tcpdumps in Wireshark, it shows what appears to be a nearly exact 30 second delay where the initiator stops talking to the target server, then abruptly restarts. Currently 8 machines are talking to 2 servers with 4 targets a piece, and while its working, we get good throughput. Activity is moderately high, as we are using the iSCSI targets as spool disks in an email cluster. As it appears that iscsi-target is a single-threaded process, would it be valuable to put each target in its own process on its own port? At any rate, this is causing serious problems on the mail processing machines. -- Jason T. Nelson GPG key 0xFF676C9E pgpAAGlC6hiog.pgp Description: PGP signature
