[Date Prev][Date Next] [Chronological] [Thread] [Top]

Re: Delta-syncrepl and latency

On 5/9/07, Quanah Gibson-Mount <quanah@zimbra.com> wrote: 


--On May 9, 2007 2:51:23 PM -0400 Sam Tran <stlist@gmail.com> wrote:

> On 5/9/07, Quanah Gibson-Mount <quanah@zimbra.com> wrote:
>>
>>
>> --On May 9, 2007 12:46:18 PM -0400 Sam Tran <stlist@gmail.com> wrote:
>>
>> > On 5/8/07, Quanah Gibson-Mount <quanah@zimbra.com> wrote:
>> > [snip]
>> >>
>> >> How have you tuned DB_CONFIG for the accesslog backend?
>> >>
>> >> --Quanah
>> >>
>> >
>> > Here is my DB_CONFIG for the accesslog backend:
>> >
>> > set_cachesize   0       52428800        0
>> > set_lg_regionmax        1048576
>> > set_lg_max              10485760
>> > set_lg_bsize            2097152
>> > set_lg_dir              /var/log/openldap_bdb/accesslog
>> > set_tmp_dir             /tmp
>>
>> Have you looked at the output of db_stat -m to see how things are
>> behaving?
>>
>
> I ran 1,000 sequential writes on the provider. Then run the command
> you specified. Here is the output:
>
> According to the output most of the data is in cache.
> It took about 5 minutes for the consumer to get the updates.
> I still don't know why.

Well, things seem fine from the accesslog DB side.  On my servers @
Stanford, the largest latency I've seen is about 7 seconds.  I wonder if
something is slow on your network.


I don't think the network speed is the problem here.
I am running a host-based firewall on the consumer server. I only
allow traffic on port 636 between the consumer and the provider. Do I
need to open other holes for delta-syncrepl to work?

Thanks,
Sam