[venti]

How does that compare to other cloud servers?

[rshm]

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

[reidrac]

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.

[antouank]

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]

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).

[growt]

You can read my comment history for exact numbers. But for SSD storage it's not very good. Better than amazon EC2 though (t2 instance).

[edouardb]

You should have a look to the IOPS instead bandwidth

  root@instantcloud:~# fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=16 --size=4G --readwrite=randwrite
  test: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=16
  fio-2.1.11
  Starting 1 process
  Jobs: 1 (f=1): [w(1)] [100.0% done] [0KB/18714KB/0KB /s] [0/4678/0 iops] [eta 00m:00s]

  root@instantcloud:~# fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=16 --size=4G --readwrite=randread
  test: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=16
  fio-2.1.11
  Starting 1 process
  Jobs: 1 (f=1): [r(1)] [100.0% done] [22307KB/0KB/0KB /s] [5576/0/0 iops] [eta 00m:00s]

[buster]

Didn't know about fio, thanks!