READ ONLY FORUM: m23 :: makes software distribution easy

psyray · Guest

Hi,

I'm trying to restore an image file on a client.

Restore was fine but too slow for my opinion (~100 min).
I don't know why.

Image file is ~2G bz2 compressed, 160G uncompressed.
Network card is 100Mbs on client, 1Gbps on server.
Switch is 1Gbps.
Client HDD is 160Gb 5400K (write test report ~80Mo/s, read test ~95Mo/s)

I'm using m2 13.2 rock (100694) out of the box, no manual modifcation.

Image creation was also really slow.

What can i do to speed up things ?

Thanks for reply.
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Server config is

Server versions

m23 version and patch level: 13.2 rock (100694)
Installation medium: CD
OS: Debian GNU/Linux 7 \n \l
Virtual machine or native: native
Kernel: Linux easi-oem 3.2.0-4-486 #1 Debian 3.2.51-1 i686 GNU/Linux

Network settings

Internet connection check: ok
Domain name resolution check: ok
Download without proxy: MD5 ok Size ok
Download with proxy: MD5 ok Size ok

Daemons

Apache: Apache/2.2.22 (Debian)
MySQL: Version de MySQL: 5.5.31 Protocole utilisé par MySQL: 10 Uptime: 11782 Threads: 12 Questions: 23159 Slow queries: 0 Opens: 348 Flush tables: 1 Open tables: 84 Queries per second avg: 1.965

Free disk space

Maren · Guest

Bonjour

(or are there any other countries which use Megaoctets?...)

I guess the speed is something you will have to live with at the moment - as long as you do not use an SSD and a very fast processor.

Reading of your 160 GB takes already (an ideal) 28 minutes.

Writing is (in best case) 34 minutes alone.

Compressing 160 GB with bzip2 will take a long time, depending on your processor. You can speed this up a tiny bit using the alternative gzip compression - then the image file will be a bit bigger, but compressing / uncompressing will be a little faster.

The compression / decompression will be the bottleneck, not the network speed nor the hard disk speed.

The next m23 version will make use of partclone instead of dd, so that empty sectors will not go into the image and will not go through the compression / decompression routine.
This will speed up the process for mostly empty hard disks, as yours seems to be.

So don't worry, it seems everything is fine with your computers Smile

and the next version will improve speed.

Bonne Fête,

Maren