[CentOS] iSCSI best practices

Mon Dec 12 14:13:13 UTC 2011
Rudi Ahlers <Rudi at SoftDux.com>

On Mon, Dec 12, 2011 at 3:52 PM, Reindl Harald <h.reindl at thelounge.net> wrote:
>
>
> Am 12.12.2011 14:49, schrieb lhecking at users.sourceforge.net:
>>
>>> Outage is one thing, but having the disk volumes disappear mid-transaction can be detrimental to a file system's health.
>>
>>  To get this back on-topic and closer to the OP's requests, are there any
>>  particular iscsi settings one should consider to increase resiliency and
>>  minimise the impact of e.g. a rebooting switch? timeout settings? The
>>  big disadvantage of iscsi is that you add another layer that can fail
>>  (compared to having virtual machine images on a local disk).
>
> you should always have two links to your iSCSI device and two
> different switches so that it does not matter if one switch
> dies or reboots
>
>


And then you still have the iSCSI applicance / server to worry about.
It can fail as well. Even with redundancy PSU's it could fail - the
RAM, CPU, motherboard, controller card, expensive RAID card, etc can
fail as well.


-- 
Kind Regards
Rudi Ahlers
SoftDux

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