[Networker] NDMP backup times very diferents

Hello;

We are doing NDMP backups for emails files on NFS shared CelerraNS702G, now we have 1TB and 8 millions of files.

We se the backups time are very different, sometimes the backup takeslittle time and usually long time.


For example:
12/02/10 22:01:14 13/02/10 11:30:34 30 GB 7 /MAILIN_USERS        411142**
13/02/10 22:01:06 14/02/10 16:20:21 296 GB 1 /MAILIN_USERS      1932412
14/02/10 22:01:26 15/02/10 08:50:08 11 GB 2 /MAILIN_USERS        194401**
15/02/10 22:01:27 16/02/10 08:11:55 34 GB 3 /MAILIN_USERS        414108
16/02/10 22:01:13 17/02/10 07:20:35 31 GB 4 /MAILIN_USERS        416506
17/02/10 22:01:10 18/02/10 09:20:40 34 GB 5 /MAILIN_USERS        425291**
18/02/10 22:00:47 19/02/10 09:46:05 34 GB 6 /MAILIN_USERS        426509**
19/02/10 22:01:42 20/02/10 12:54:36 32 GB 7 /MAILIN_USERS        408223**
20/02/10 22:01:11 21/02/10 16:00:04 327 GB 1 /MAILIN_USERS      2077898
21/02/10 22:01:57 22/02/10 07:09:49 11 GB 2 /MAILIN_USERS        186707
22/02/10 22:02:16 23/02/10 01:46:36 38 GB 3 /MAILIN_USERS        419895++
24/02/10 22:04:28 25/02/10 08:04:46 50 GB 5 /MAILIN_USERS        510389**
25/02/10 22:01:57 26/02/10 05:08:11 31 GB 6 /MAILIN_USERS        421656
26/02/10 22:01:43 27/02/10 06:06:30 39 GB 7 /MAILIN_USERS        418930
27/02/10 22:01:56 28/02/10 11:59:44 362 GB 1 /MAILIN_USERS      2261414
28/02/10 22:01:27 01/03/10 05:07:02 10 GB 2 /MAILIN_USERS        210141
01/03/10 22:01:27 02/03/10 09:52:00 35 GB 3 /MAILIN_USERS        437058**
02/03/10 22:01:32 03/03/10 01:51:32 28 GB 4 /MAILIN_USERS        405626++
03/03/10 22:01:58 04/03/10 08:01:55 28 GB 5 /MAILIN_USERS        405059**

we could see ++ are good times and ** bad times, ¿why?
We are using "dump" command (nsrndmp_save -T dump) and options
HIST=y
UPDATE=y
DIRECT=y
OPTION=NT
UTF=8
SNAPSURE=y

Any ideas?
Any hints where to look?
Possible causes?


Excuse me English; and thanks;

Arkaitz
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ARKAITZ ABAD URIARTE

Euskal Herriko Unibertsitatea              Email: arkaitz.abad @ehu.es
Bizkaiko I.I.S.I.G                         Tel. : 94 601 8390
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