From: | Willy-Bas Loos <willybas(at)gmail(dot)com> |
---|---|
To: | Jesper Krogh <jesper(at)krogh(dot)cc> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: [PERFORMANCE] expanding to SAN: which portion best to move |
Date: | 2011-05-04 05:25:02 |
Message-ID: | BANLkTi=eNeQmYLqNm-E36G9UPwTnsTtHBw@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general pgsql-performance |
are you saying that, generally speaking, moving the data would be better
unless the SAN performs worse than the disks?
besides your point that it depends on what our end looks like i mean.
(and what do you mean by "the DAS way", sry no native speaker)
cheers,
wbl
On Wed, May 4, 2011 at 6:43 AM, Jesper Krogh <jesper(at)krogh(dot)cc> wrote:
>
> If you're satisfied with the current performance then it should be safe
> to keep the indices and move the data, the risk of the SAN performing
> worse on sequential I/O is not that high. But without testing and
> knowledge about the SAN then it is hard to say if what you currently
> have is better or worse than the SAN. The vendor may have a "way better
> san",
> but is may also be shared among 200 other hosts connected over iSCSI or FC
> so your share may be even worse than what you currently have.
>
> Without insight and testing is it hard to guess. I've pretty much come
> to the conclusion of going the DAS way every time, but it all depends on
> what your end looks like.
>
> --
> Jesper
>
--
"Patriotism is the conviction that your country is superior to all others
because you were born in it." -- George Bernard Shaw
From | Date | Subject | |
---|---|---|---|
Next Message | Jesper Krogh | 2011-05-04 05:33:25 | Re: [PERFORMANCE] expanding to SAN: which portion best to move |
Previous Message | Jesper Krogh | 2011-05-04 04:43:20 | Re: [PERFORMANCE] expanding to SAN: which portion best to move |
From | Date | Subject | |
---|---|---|---|
Next Message | Rishabh Kumar Jain | 2011-05-04 05:26:10 | Re: Order of tables |
Previous Message | Rishabh Kumar Jain | 2011-05-04 05:23:38 | Re: Order of tables |