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Its normal for ssd speed?
I have Server Dedibox XC SSD from online.net and I test the IO Speed
`Disk Speed
I/O (1st run) : 128 MB/s
I/O (2nd run) : 129 MB/s
I/O (3rd run) : 128 MB/s
Average I/O : 128.333 MB/s`
and my question is this speed normal or can I achive more best result with tweaking or something?
Comments
Is write back cache enabled? Is it connected via sata 3?
Yes its connected with SATA 3
`
server@online:~$ dmesg | grep SATA
[ 1.191481] ahci 0000:00:18.0: AHCI 0001.0300 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
[ 1.194655] ata1: SATA max UDMA/133 abar m2048@0xdf1a9000 port 0xdf1a9100 irq 43
[ 1.194659] ata2: SATA max UDMA/133 abar m2048@0xdf1a9000 port 0xdf1a9180 irq 43
[ 1.514791] ata2: SATA link down (SStatus 0 SControl 300)
[ 1.522856] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
`
Is this a single SSD ? or do you have any raid setup ?
SSD speeds are ~300MB/s min.
It very depends on SSD model. Old generations like the one in Dedibox XC SSD have much slower speeds. I have SYS E3-SSD3 server and the speed is similar to the OP's.
If that is Read speed then it is to slow
If that is Write speed then it is fine
Perfectly NO.
As it looks, you have used FreeVPS Benchmark Script, if I am not wrong.
Normal HDD gives up about 170-200 MB/s.
Now compare.
Holy crap what disks do you use? I only get 120 on some new sata3 drives!
For ssd I would say it's fine for sata2, don't worry too much about it.
Our single ST1000DM003 drives perform better than that.
Who is using crap disks?
My old dedibox from Online were having stable 200-300 MB/s dd test. But it also depends with what the other application running. Do you run another application with intensive io usage? Or it's a new fresh installed OS?
its single SSD
its just running nginx php7-0-fpm and mariadb
any tweaking available for boost the performance? I'm using Ubuntu 14.04.4 LTS
hdparm info show
ATA device, with non-removable media Model Number: SAMSUNG MZ7LN128HCHP-00000 Serial Number: S1ZFNXAG607174 Firmware Revision: EMT0100Q Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0http://www.samsung.com/semiconductor/products/flash-storage/client-ssd/MZ7LN128HCHP?ia=831
140MB/s write
I'm using freevps bench.sh for IO test, I guess that script for test read it should have Up to 540MB/s But my SSD speed average just 128MB/s
but its weird.. I test using hdparm
`sudo hdparm -Tt /dev/sda
/dev/sda: Timing cached reads: 3856 MB in 2.00 seconds = 1928.44 MB/sec Timing buffered disk reads: 1498 MB in 3.00 seconds = 499.15 MB/sec`
its show 499.15 MB/sec why using freevps bench.sh its show different?
The freeVPS script tests your HDD write speed using DD.
Hence, the 140MB/s write speed as defined by Samsung is correct. It is +- the margin of the speed you received. Higher results may be produced with cache. (so the same file is read)
That particular DD test doesn't test read speed.
IO ping may be more reliable, for in-depth testing.
Extract from script - clearly 1GB random write test.
# Measuring disk speed with DD io=$( ( dd if=/dev/zero of=test_$$ bs=64k count=16k conv=fdatasync && rm -f test_$$ ) 2>&1 | awk -F, '{io=$NF} END { print io}' | sed 's/^[ \t]*//;s/[ \t]*$//' )wow samsung suks, I have intel 520 on sata 2, read/write is 200mb +.
Please measture using fio IOPS test also:
Download and extract the 'raw' link from https://github.com/Crowd9/Benchmark/blob/master/fio-2.0.9.tar.gz
You'll require metapackage build-essentials to run 'make' inside the folder.
Then :
./fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=64 --size=10G --readwrite=randrw --rwmixread=75(using 10G file to eliminate any caching in RAM)
The real benefit of SSD is in the 10s-100s of thousands of IOPS for application loading speed and database seeks .
Anyone got some other drives ?
Honestly it doesn't make a huge difference in real world.
I've got also Intel SSD 320 series 120 GB with 130 MB/s write speed and DELL Intel SSD DC S3500 160 GB with 175 MB/s write speed. The 240 GB model is probably the fastest but very hard to get (Kingston ?).
Looks like some old SSD from online.net but not sure as before I had SSD server with online.net and got stable 500 MB/s on RAID 1 but probably have some better model it was some special server for €20 /Month probably that was the cause.
Example of my SSD Intel 535 Series
dd if=/dev/zero of=test bs=64k count=16k
16384+0 records in
16384+0 records out
1073741824 bytes (1.1 GB) copied, 0.536792 s, 2.0 GB/s