There is only one client, with mounts i mean file system mounts. The client has
exactly 32 mount with different sizes. We divide these mounts into four parts
in each part there is 8 mounts (save sets as /data1, /data2 etc...). Each
part's size is exactly 200GByte. Then we create 4 group(group1, group2,
group3,group4), and assign these 8-mounted parts to groups. Every group has 8
mounts (save sets). The client paralellism is 8, group paralellism is 8, and
drive target sessions set to 8. We first start the group1 and 8 sesssion goes
to drive1. Then we start group2, 8 session g oto drive 2. Then when we start
group3 and group4, the next drives are not used. It waits fort he group1 and
2's session complete.
-----Original Message-----
From: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU]
On Behalf Of Maarten Boot (CWEU-USERS/CWNL)
Sent: Friday, September 16, 2005 12:20 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] How to use all tapes together?
Hi,
There are several ways you could approach this but there are also obstacles.
First i do not understand what you mean with mounts (is that filesystems, as
in /data1, /data2, ... ).
Second if you set the drive paralellism to 8 then because of client parallel
is also 8 all 8 backups tend to go to only one drive. To force the use of 4
drives set dive paralellism to 1 or 2. With a client paralellism (you have
only one client if I understand right), this will distribute the data streams
to all drives.
Now note: it is also important to understand how your data is organized on
this 800Gb is this one big Raid box or are this separate dirives (not
partitions) tell me more about that as it could influence the speed of your
backup if you start reading 4 or 8 datastreams from the same disk/raidbox.
hope this helps a bit and feel free to ask more
Maarten
On Friday 16 September 2005 07:51, Turgay Çavdar wrote:
> We are using networker version 7.1.2 and 4 tapes in the jukebox. We have
> got one client and it has 800 GB of data (32 mount). We planned to divide
> this 800GB of data to 4 parts (approx. 200GB and 8 mount in each part) and
> use every tape so the Backup time will be very short. We create 4 group and
> in the client we set for 8 mounts for every group. Server parallism is 32,
> client parallelism is 8, group parallelism is 8, each tape has a target
> session value set to 8. In this configuration when we start 4 group only
> two tapes are used. Why we cant use 4 drives at the same time? (Jukebox
> parallism set to 4)
>
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--
Maarten Boot,
Compuware Europe B.V.
Hoogoorddreef 5
1101 BA Amsterdam
Tel: +31 20 312 6511
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