Bandwidth testing: Difference between revisions
From genomewiki
Jump to navigationJump to search
(adding copy to hive and rsync) |
(rsync notes) |
||
| Line 17: | Line 17: | ||
The /dev/shm copy to /tmp is done ten times with the cp command: | The /dev/shm copy to /tmp is done ten times with the cp command: | ||
cp -p /dev/shm/memToMem.$I.zero ./memToFile.$I.zero | cp -p /dev/shm/memToMem.$I.zero ./memToFile.$I.zero | ||
The rsync /dev/shm to /dev/shm was to and from hgwdev. Multiple instances of rsync | |||
from kolossus to hgwdev seemed to add together for a total bandwidth. | |||
The machine mitzie is at the end of a Santa Cruz DSL line and over a WiFi | |||
network connection across the driveway to the garage. | |||
Revision as of 23:44, 12 May 2010
Machines tested
| machine name | processor speed | memSize | 10 files of size | dd /dev/zero to /dev/shm | cp /dev/shm to /tmp | cp /dev/shm to hive | rsync /dev/shm to /dev/shm |
|---|---|---|---|---|---|---|---|
| hgwdev | Opteron 1150 Mhz | 32 Gb | 1 gB | 800 mB/s | 287 mB/s | 54 mB/s | 144 mB/s |
| kolossus | Intel 2261 Mhz | 1 Tb | 1 gB | 1980 mB/s | 192 mB/s | 41 mB/s | 120 mB/s 4X rsync |
| okazaki | Intel 1600 Mhz | 2 Gb | 76 mB | 700 mB/s | 90 mB/s | 11.3 mB/s | 11.5 mB/s |
| mitzie | Intel 400 Mhz | 512 Kb | 18 mB | 113 mB/s | 25 mB/s | n/a | 37 kB/s up down |
Procedure
Sizing files based on available /dev/shm space. Largest file size limited to 1 gB.
The /dev/zero to /dev/shm write is done ten times with a dd command:
dd if=/dev/zero of=/dev/shm/memToMem.$I.zero bs=200000 count=$ddCount
The /dev/shm copy to /tmp is done ten times with the cp command:
cp -p /dev/shm/memToMem.$I.zero ./memToFile.$I.zero
The rsync /dev/shm to /dev/shm was to and from hgwdev. Multiple instances of rsync from kolossus to hgwdev seemed to add together for a total bandwidth.
The machine mitzie is at the end of a Santa Cruz DSL line and over a WiFi network connection across the driveway to the garage.
