3 ms·

Tested on random instance, without any io intensive application running VULTR 2 GB INSTANCE dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 10

by rshm 12y ago

Tested on random instance, without any io intensive application running VULTR 2 GB INSTANCE dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 8.11451 s, 132 MB/s hdparm -tT /dev/vda /dev/vda: Timing cached reads: 25106 MB in 2.00 seconds = 12568.51 MB/sec Timing buffered disk reads: 496 MB in 3.02 seconds = 164.16 MB/sec DIGITALOCEAN 2GB INSTANCE hdparm -tT /dev/vda Timing cached reads: 8926 MB in 2.00 seconds = 4468.52 MB/sec Timing buffered disk reads: 542 MB in 3.00 seconds = 180.43 MB/sec dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 32.0005 s, 33.6 MB/s

antouank 12y ago
Did the same test on a VM I have in DigitalOcean... ( Ubuntu, 512 MB droplet ) ~# dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 2.35872 s, 455 MB/s
- hobarrera 12y ago
  Add four spaces at the start of a line to mark it as code (both to avoid lines being merged and fixed-width font). (yes: it's just markdown here).
reidrac 12y ago
I'm not sure how good is the test as it depends on the IO levels of the host where the VM instance is running. This is a 1GB Debian Wheezy instance with regular HDD in Memset [1]: dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 17.7142 s, 60.6 MB/s I checked the host and its load is average. DO's 33.6 MB/s sounds poor. [1] disclaimer: Memset hosting is my employer, I built some of this; but this is an honest test (personal VM running several services). EDIT: formatting EDIT 2: same test on a VM with SSD disk: dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 3.48953 s, 308 MB/s Again, the host has average load.

by rshm 12y ago

antouank 12y ago

Did the same test on a VM I have in DigitalOcean... ( Ubuntu, 512 MB droplet ) ~# dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 2.35872 s, 455 MB/s

hobarrera 12y ago
Add four spaces at the start of a line to mark it as code (both to avoid lines being merged and fixed-width font). (yes: it's just markdown here).

reidrac 12y ago

I'm not sure how good is the test as it depends on the IO levels of the host where the VM instance is running. This is a 1GB Debian Wheezy instance with regular HDD in Memset [1]: dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 17.7142 s, 60.6 MB/s I checked the host and its load is average. DO's 33.6 MB/s sounds poor. [1] disclaimer: Memset hosting is my employer, I built some of this; but this is an honest test (personal VM running several services). EDIT: formatting EDIT 2: same test on a VM with SSD disk: dd bs=1M count=1024 if=/dev/zero of=test conv=fdatasync 1024+0 records in 1024+0 records out 1073741824 bytes (1.1 GB) copied, 3.48953 s, 308 MB/s Again, the host has average load.