Sorry but not so firm in kernel hacking and structures, but if I've understood this correctly it should perform normally?! The problem is that I do a readahead (the tool) on a iscsi device with infortrend iscsi san as backend to warm up caches and my connection died, correctly the whole controller died and have to be reseted.
> Sorry but not so firm in kernel hacking and structures, but if I've
> understood this correctly it should perform normally?!
> The problem is that I do a readahead (the tool) on a iscsi device with
> infortrend iscsi san as backend to warm up caches and my connection died,
> correctly the whole controller died and have to be reseted.
> Has anyone an idea?
On improperly mastered (?) DVDs there once (years ago) was a problem that read-
ahead would exceed the end of the device, causing errors. I don't know for iSCSI, but generally reading infrequent large chunks is better than reading frequent short junks.
> Sorry but not so firm in kernel hacking and structures, but if I've > understood this correctly it should perform normally?! > The problem is that I do a readahead (the tool) on a iscsi device with > infortrend iscsi san as backend to warm up caches and my connection died, > correctly the whole controller died and have to be reseted.
It should normally work. The iscsi layer is basically just passing around scsi commands, so it does not know if read ahead is being used or now and should not care. I do not know about specific targets and the settings they need.
On Fri, Jul 03, 2009 at 04:10:19PM +0200, Maddin wrote:
> Hi folks,
> Sorry but not so firm in kernel hacking and structures, but if I've
> understood this correctly it should perform normally?!
> The problem is that I do a readahead (the tool) on a iscsi device with
> infortrend iscsi san as backend to warm up caches and my connection died,
> correctly the whole controller died and have to be reseted.
> On Fri, Jul 03, 2009 at 04:10:19PM +0200, Maddin wrote:
>> Hi folks,
>> Sorry but not so firm in kernel hacking and structures, but if I've >> understood this correctly it should perform normally?! >> The problem is that I do a readahead (the tool) on a iscsi device with >> infortrend iscsi san as backend to warm up caches and my connection died, >> correctly the whole controller died and have to be reseted.
> Whoa! Have you filled a ticket with them?
Yes sir, ticket is opened. But unfortunately they can't reproduce the whole bahvior. At their tests, the nic was stopping answering on pings, and now this ticket was escalated to 2nd level support. Now i have to wait.
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