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Time4vps 50% off for VPS, storage hosting and VPN. Today only 100 coupons!
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Comments
@Chuck Seen.
Quick money with non recurring discounts.
not for KVM
They still keep it for a sweet.
I used time4vps a few years back. The I/O write speed was terrible not sure about now. Still a good offer for a 1 month (or 1 year) project... Non recurring? no problem, no contract...
1GB RAM (non kvm) for 38.94 EUR per 1st year is it worth it guys? I'm tempted to get one...
I don't mean to hijack this thread by I saw another offer on LEB... https://www.sparkvps.com/crm/cart.php?a=confproduct&i=0 $39/yr for 6GB RAM + 100 GB SSD
They set disk I/O limit to 100MB/s.
i'm running a home server and have 6x Samsung 850 Evo 250GB SSDs (xfs perc h700 raid controller)...
output of a write test:
[root@localhost] sync; dd if=/dev/zero of=tempfile bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 1.95942 s, 548 MB/s
output of a read test:
[root@localhost]# dd if=tempfile of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 0.171463 s, 6.3 GB/s
but 100MB/s? come on now...
Ah, nice, grabbed one 1T! Thanks for the information!
Noisy neighbours are not welcome?
storage server, ramp that up to 20TB and lets see how you feel about spinning drive speeds for remote storage
Let us join and ruin it.
6.3GB/s does not compute. You have 6 drives in raid0 at roughly half a gig/sec each. Do the math. This might be one of those cases where people complain about using dd like this incorrectly because the results are wildly wrong.
Copy 50GB image and check speed.
You're right. That 6.3GB/s is probably being done from cache. lol. dd isn't an appropriate way to measure I/O performance. I tried other benchmark applications like iozone, bonnie++, etc. and tweak them to my desired read/write patterns.
I'm playing with nr_requests and read_ahead_kb. I've also found that with iozone instead of dd I get quite different numbers and the differences between the servers seem to vanish.
Edit: Thanks for the heads up!
It's okay to use dd if you're only testing sequential speeds, the other tools you mention are better for overall profiling (eg: random IOPs, latency measurements at queue lengths, etc). The important thing with dd is to write enough that'll saturate the write cache so you don't get inflated numbers like this. Different block sizes and such (like the 'conv' option) have a lot of impact as well. It's still a perfectly decent test tool, it's just the variables are a little wilder.
Got one to try their VPN and its quite good so far