[cisco-voip] Unity Connection - Mailbox Stores

Wed Mar 23 14:58:14 EDT 2011

Additionally, the Unity doc states that DRS backups put a heavy load on the
server, and should be started, ran, and completed within a maintenance
window (or overnight).  It gives an example of 3GB/hr, so a 15GB store can
be backed up in 6 hours.

My question is:  If I have an HA pair, and the environment is designed such
that the secondary server handles all calls first, could I run the backup
mid-day on the primary without impact to the secondary?

Anthony

On Wed, Mar 23, 2011 at 1:31 PM, Anthony Holloway <
avholloway+cisco-voip at gmail.com> wrote:

> Awesome!  I am on 8.5(1)SU1, and will try multiple SFTP solutions.  Thanks
> again for the replies.
>
> The reason I would want to go above the 15GB threshold is simply to "use
> what I paid for."  Well, not me, the client.
>
> See, an MCS-7835-I3 is stated to hold 20-30 minutes of audio for up to
> 4,000 users, or 240,000 minutes.  Well, I don't have 4,000 users, just over
> 1,000 in fact, but I still want to use that 240,000 minutes, which would
> give me 200-240 minutes per user.
>
> I wouldn't disagree with anyone if they said that logic was flawed.  ;)
>
> Anthony
>
>
> On Wed, Mar 23, 2011 at 8:41 AM, Pat Hayes <pat-cv at wcyv.com> wrote:
>
>> To the original question of whether or not you can specify over the
>> DRS recommended 15 gigs, yes, you can, but why would you want to? DRS
>> being the only supported method of periodic backups, you are
>> potentially putting your system at risk by going outside of that.
>>
>> For problems backing up the mailbox store, I think there are two main
>> ones - first, the SFTP server you use needs to support file uploads
>> that large. Check the archives for details on some known problem
>> servers. You can verify easily enough by trying to manually upload a
>> large file to your server, if it is going to fail it usually fails
>> around 1 or 2 gigs. Second, defect CSCtf40892 can cause your backup to
>> stall out and fail, usually around the 3 gig mark. Check the bug for
>> full details, but essentially everything 7.x prior to 7.1(5b)su3 and
>> 8.x prior to 8.5(1) is impacted. If you can get past those two issues,
>> it should be smooth sailing :-)
>>
>> On Tue, Mar 22, 2011 at 7:49 PM, Bill Simon <bills at psu.edu> wrote:
>> > All,
>> >
>> > We have a 10k user base and about 10GB mail store. Backups (DRS) seldom
>> > worked on CUC 7.1. Just last weekend upgraded to 8.5 and backups are
>> working
>> > fine for this whole mail store. SFTP backups to a Linux server/OpenSSH.
>> >
>> > Backups and increased scalability were the reasons we moved to 8.5. If
>> > you've got a large system, consider moving to this version.
>> >
>> >
>> > On 3/22/11 7:19 PM, Erick B. wrote:
>> >>
>> >> Hmm... yea, on the 8.02 I have it always fails at just over a gig on
>> >> both mailstores>  1 gig. The one mailstore we don't backup the
>> >> messages in anymore however, just a lot of mailboxes for various
>> >> sites.
>> >>
>> >> I've worked with TAC on this in past, and they didn't suggest using
>> >> more mailstores to help with the backup issue. We had tried a dozen or
>> >> so different SFTP servers and all failed at a gig most of time, so we
>> >> ruled out SFTP server as problem. Any mailstore less then a gig backs
>> >> up fine.
>> >>
>> >> I'll make some more mailstores to see what the limit is.
>> >>
>> >> Also, can't move the system mailboxes off the default mailstore.
>> >>
>> >>
>> >> On Tue, Mar 22, 2011 at 5:49 PM, Jobe Gates<jobe at gates-tribe.com>
>>  wrote:
>> >>>
>> >>> Mine was up to 6GB's so yes it should go over 1. I thought 5 was the
>> >>> limit on 7.x. Not sure about 8.
>> >>>
>> >>>
>> >>> Thanks,
>> >>> Jobe
>> >>>
>> >>> On Mar 22, 2011, at 6:18 PM, "Erick B."<erickbee at gmail.com>  wrote:
>> >>>
>> >>>> I am having DRS fail at 1 gig, with mailstores over 1 gig in size.
>> >>>> I've recently split a client into 5 mailstores now to get past the
>> drs
>> >>>> issue.
>> >>>>
>> >>>>
>> >>>> this is with unity connection 8.02
>> >>>>
>> >>>> so drs should be able to do larger then 1 gig? on the ones it fails
>> on
>> >>>> the drs backup process sits at 40% for awhile then fails....
>> >>>>
>> >>>> Does anyone know if there is a limit to # of mailstores you can have?
>> >>>>
>> >>>>
>> >>>> On Tue, Mar 22, 2011 at 3:54 PM, Jobe Gates<jobe at gates-tribe.com>
>> >>>>  wrote:
>> >>>>>
>> >>>>> I've had DRS problems with large stores.  This was on 7.1 and there
>> was
>> >>>>> a known bug if you go over 10GB it would fail.
>> >>>>>
>> >>>>> Thanks,
>> >>>>> Jobe
>> >>>>>
>> >>>>> On Mar 22, 2011, at 4:37 PM, Tanner Ezell<tanner.ezell at gmail.com>
>> >>>>>  wrote:
>> >>>>>
>> >>>>>> Certainly,
>> >>>>>>
>> >>>>>> If you haven't already check out the design guide for CUC:
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> http://www.cisco.com/en/US/docs/voice_ip_comm/connection/8x/design/guide/8xcucdgpdf.pdf
>> >>>>>>
>> >>>>>> Section 6 page 4 includes notes about scalability specifically the
>> 2GB
>> >>>>>> performance limitation I mentioned.
>> >>>>>>
>> >>>>>> Regarding mail box size, I cannot speak to that I'm afraid. I have
>> not
>> >>>>>> been in a deployment that used such a large mail box.
>> >>>>>>
>> >>>>>> Also, the CUC guide contains specific sections on scaling which
>> will
>> >>>>>> probably be on use to you.
>> >>>>>>
>> >>>>>> Tanner
>> >>>>>>
>> >>>>>> On Tue, Mar 22, 2011 at 1:29 PM, Anthony Holloway
>> >>>>>> <avholloway+cisco-voip at gmail.com>  wrote:
>> >>>>>>>
>> >>>>>>> Thank you Tanner.  This is for a 1,200 user deployment on a pair
>> of
>> >>>>>>> MCS-7835-I3's, with 300GB HDD space, and 4GB of memory.
>> >>>>>>> Do you have a source for the 2GB per mailbox comment, or is that
>> >>>>>>> coming from
>> >>>>>>> experience?
>> >>>>>>> Also, can you comment on the 15GB per mailbox store, as it
>> pertains
>> >>>>>>> to DRS
>> >>>>>>> backing up at a rate of 3GB/hr?
>> >>>>>>> Anthony
>> >>>>>>>
>> >>>>>>> On Tue, Mar 22, 2011 at 3:05 PM, Tanner Ezell<
>> tanner.ezell at gmail.com>
>> >>>>>>> wrote:
>> >>>>>>>>
>> >>>>>>>> Mailbox sizes above 2GB are not recommend for performance
>> reasons. I
>> >>>>>>>> don't believe there is a hard limit on mailbox size.
>> >>>>>>>>
>> >>>>>>>> Depending on how many users you are supporting and the hardware
>> >>>>>>>> running the platform will really determine the best course of
>> >>>>>>>> action.
>> >>>>>>>> Anything less than a 50-100 users I wouldn't worry about, beyond
>> >>>>>>>> that
>> >>>>>>>> you need to take performance into consideration.
>> >>>>>>>>
>> >>>>>>>> On Tue, Mar 22, 2011 at 10:03 AM, Anthony Holloway
>> >>>>>>>> <avholloway+cisco-voip at gmail.com>  wrote:
>> >>>>>>>>>
>> >>>>>>>>> Unity Gurus,
>> >>>>>>>>> I am reading up on the what's what with Mailbox Stores in CUC
>> 8x,
>> >>>>>>>>> and I
>> >>>>>>>>> have
>> >>>>>>>>> two questions:
>> >>>>>>>>> 1. How closely should I stick to the 15GB per mailbox store for
>> DRS
>> >>>>>>>>> purposes?
>> >>>>>>>>> 2. Ignoring DRS concerns, how large can a mailbox store be? All
>> of
>> >>>>>>>>> available
>> >>>>>>>>> disk space?
>> >>>>>>>>> In general, can you provide any real world considerations, tips,
>> or
>> >>>>>>>>> warnings
>> >>>>>>>>> about going down this path?
>> >>>>>>>>> Thanks.
>> >
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>> >
>>
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