12-02-2009
Benchmarking a new Solaris, with four different clients
Good morning,
for the impatient: I have a new backup-server and need to monitor, what the machine can do, what's the best way of finding that out?
I will tell the story right from the beginning, so you have a clue about what's going on:
I have a setup of three machines:
A new backup-server with Solaris 10/Intel, two bundled 1Gbit connections to a Netgear switch and fourteen 1,5T hard drives building a zraid with two groups a 7 drives.
Then I started rsync/scp processes from three different machines each after the other, now running simultaneously:
First one is a freshly installed FreeBSD 7.2 in a probuilt NAS case, two bundled 1Gbit connections to the very same switch and an internal 8-port raid. The controller splits the 3,5T in two junks, which I connected via ccd.
I started (on the backupserver) an rsync -varu in a screen session to it and it has by now transferred, according to du -sh, 330G of data in 17 hours.
Second is our primary fileserver. Debian Linux, 3ware Raid-Controller with 16 disks a 500G, Raid 5, six 1Gbit connections to the same switch as the backup server. It is running idle during the night and has transferred approx. in 17 hours.
Third one is a really old fileserver with Debian Linux, 4T Raid 5 and 1Gbit connection. It has transferred 40G in 100 minutes!
So, how do I monitor those machines? Most important would be to monitor the Solaris server, how fast it is able to write and read data. I think the filesystem should outrun the network connection by lightyears, true? But how can I monitor the network interfaces and how much spare bandwidth they could handle?
The third one is, well, a lemon and it is running along "for fun". But the primary fileserver should be replaced with a new Solaris machine. Yet, 330G in 17 hours is crap in an idle network on two idle machines.
I have to add of course, the files transmitted range from rather big chunks of 4G to tiny 50k files. Nevertheless, shouldn't the machines handle much more in such a long time. I need to find the bottleneck, is there something else but trying to flood the machine with twenty others?
PS: Is it normal for ZFS to cache data before writing to the disks (compression is on)? I noticed when I started the second scp, that the fileservers disks LEDs are flashing like crazy, but the backupserver's are dark for about 20 seconds, then some three second fireworks with disk activity, 20 seconds dark etc...
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LEARN ABOUT DEBIAN
backup_delhost
BACKUP_DELHOST(8) AFS Command Reference BACKUP_DELHOST(8)
NAME
backup_delhost - Deletes a Tape Coordinator entry from the Backup Database
SYNOPSIS
backup delhost -tapehost <tape machine name>
[-portoffset <TC port offset>] [-localauth]
[-cell <cell name>] [-help]
backup delh -t <tape machine name>
[-p <TC port offset>]
[-l] [-c <cell name>] [-h]
DESCRIPTION
The backup delhost command deletes the indicated Tape Coordinator entry from the Backup Database. It is then impossible to submit backup
operations to that Tape Coordinator, even if it is still running. To keep configuration information consistent, also remove the
corresponding entry from the /var/lib/openafs/backup/tapeconfig file on the Tape Coordinator machine.
To list the Tape Coordinator machines and port offsets defined in the Backup Database, issue the backup listhosts command.
OPTIONS
-tapehost <tape machine name>
Specifies the hostname of the machine housing the Tape Coordinator to delete.
-portoffset <TC port offset>
Specifies the port offset number of the Tape Coordinator to delete. If omitted, it defaults to 0. If provided, it is an integer
between 0 (zero) and 58510, and must match the port offset number assigned to the same combination of Tape Coordinator and tape device
or file in the /var/lib/openafs/backup/tapeconfig file on the Tape Coordinator machine indicated by the -tapehost argument.
-localauth
Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. The backup command interpreter presents it to
the Backup Server, Volume Server and VL Server during mutual authentication. Do not combine this flag with the -cell argument. For more
details, see backup(8).
-cell <cell name>
Names the cell in which to run the command. Do not combine this argument with the -localauth flag. For more details, see backup(8).
-help
Prints the online help for this command. All other valid options are ignored.
EXAMPLES
The following command deletes the Backup Database entry for the Tape Coordinator with port offset 2 on the Tape Coordinator machine
"backup3.abc.com":
% backup delhost -tapehost backup3.abc.com -portoffset 2
PRIVILEGE REQUIRED
The issuer must be listed in the /etc/openafs/server/UserList file on every machine where the Backup Server is running, or must be logged
onto a server machine as the local superuser "root" if the -localauth flag is included.
SEE ALSO
backup(8), backup_addhost(8), backup_listhosts(8)
COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas
Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2012-03-26 BACKUP_DELHOST(8)