Re: Export takes too long:

In article <41ih6m$eai_at_seminole.gate.net> shahmiri_at_news.gate.net (Irfan A. Shahmiri) writes:
>Hi Folks,
>

Irfan,
Regarding reducing the time taken to export the DB. You could reduce the total time by:

1. running the exports in parallel. ie.. export 1 ----> pipe 1 ----> compress ----> tape1 export 2 ----> pipe 2 ----> compress ----> tape2 export 3 ----> pipe 3 ----> compress ----> tape3 export 4 ----> pipe 4 ----> compress ----> tape4

and so on depending on how many tape drives you have.

2. Exporting and compressing the files in parallel first to disk, and

   then offline to tape.

   Try this first since writing to disk is faster. If you don't have enough    disk space you may try the first method.

Hope it helps,

Pratul

>I am managing a 25 G Management Decision Support System on a
>Sparc1000(2 cpu's). We run cold backups once every 15 days and
>exports every week. The cold backups take around 15 hours.
>The exports (have been broken down ) take a long time. Around
>10-12 hours for each backup. The way my backups work is that
>I export to a pipe, compress it and use dd to put it on to the tape.
>My export files should be around 4 to 5 Megs after compression. I have not
>tried exporting to disk and then dumping to tape for want to disk.
>Any suggestions (hardware/software) to reduce the backup time.
>
>Thanks
>
>--irfan
>
>p.s. I have the 8500 exabyte differential tape drive.
>
Received on Fri Aug 25 1995 - 00:00:00 CEST