On 5/12/2012 2:32 AM, Cor Bosman wrote:
>> Mail is always a random IO workload, unless your mailbox count is 1,
>> whether accessing indexes or mail files. Regarding the other two
>> questions, you'll likely need to take your own measurements.
>
> Wait, maybe there is a misunderstanding. I mean t
On 5/12/2012 2:26 AM, Cor Bosman wrote:
> The indexes are doing a lot of iops on the metrocluster, and it's a bit
> of an expensive option for something it's not even that good at.
This clears things up a bit.
> Im aiming for something with 2 servers, each with a 12 disk enclosure
> with SSD fo
On 12.5.2012, at 10.32, Cor Bosman wrote:
>> Mail is always a random IO workload, unless your mailbox count is 1,
>> whether accessing indexes or mail files. Regarding the other two
>> questions, you'll likely need to take your own measurements.
>
> Wait, maybe there is a misunderstanding. I mea
> Mail is always a random IO workload, unless your mailbox count is 1,
> whether accessing indexes or mail files. Regarding the other two
> questions, you'll likely need to take your own measurements.
Wait, maybe there is a misunderstanding. I mean the IO inside one
index file, not across the dif
>
>> Alternatively, does anyone have any experience with other redundant storage
>> options? Im thinking things like MooseFS, DRBD, etc?
>
> You seem to be interested in multi-site clustering/failover solutions,
> not simply redundant storage. These two are clustering software
> solutions but
On 5/11/2012 1:41 AM, Cor Bosman wrote:
> Hey all, we're in the process of checking out alternatives to our index
> storage. We're currently storing indexes on a NetApp Metrocluster which
> works fine, but is very expensive. We're planning a few different setups and
> doing some actual performa
On 11.5.2012, at 13.56, Javier de Miguel Rodríguez wrote:
>> Even without LDA/LMTP dovecot-imap needs to write right? It would
>> need to update the index every time an imap connect happens and
>> new mails are found in the mail store.
>
> Well of course. Indexes are also updated when flags are m
Even without LDA/LMTP dovecot-imap needs to write right? It would
need to update the index every time an imap connect happens and
new mails are found in the mail store.
Well of course. Indexes are also updated when flags are modified, moved
a messages, delete a message, etc.. But in my setup th
Hi javier,
>
>
> Indexes are very random, mostly read, some writes if using
> dovecot-lda (ej: dbox). The average size is rather small, maybe 5 KB in
> our setup. Bandwith is rather low, 20-30 MB/sec
Even without LDA/LMTP dovecot-imap needs to write right? It would
need to update the index ev
Indexes are very random, mostly read, some writes if using
dovecot-lda (ej: dbox). The average size is rather small, maybe 5 KB in
our setup. Bandwith is rather low, 20-30 MB/sec
We are using HP
LeftHand for our replicated storage needs.
Regards
Javier
El
11/05/2012 08:41, Cor Bosman esc
Hey all, we're in the process of checking out alternatives to our index
storage. We're currently storing indexes on a NetApp Metrocluster which works
fine, but is very expensive. We're planning a few different setups and doing
some actual performance tests on them.
Does anyone know some of t
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