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Questions tagged [iops]

111 questions
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Estimate the IOPS in RAID 10

According to http://en.wikipedia.org/wiki/IOPS For example SAS disks provide ~200 IOPS each. For RAID 10 consisting of 4 such disks. How much IOPS I could expect for that array? I would think it would be about 400 or is it 800? (800 especially in…
bakytn
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Disk IOPS count in GNU/Linux

I can't find information about ways to count disk iops in GNU/Linux for some time period. I saw iostat, but I'm not sure it is right way. Also i need tool, that can count iops for all time since system is started, but iostat doesn't do this. I mean…
rush
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SAN spec'ing and IOPS counters

I'd like to make sure that I'm measuring IOPS correctly across Windows and Linux servers. We're busy trying to figure out which SAN would best suit our environment and measuring IOPS across our servers is the kind of thing I just can't get wrong.…
Athanasios
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gluster IOPS performance

Can "gluster" serve FLV files without any front-end server layers just using the built-in HTTP protocol ? How would the IOPS compare to standard apache serving? Would gluster help me with I/O limits of harddrives, if I chained a lot of machines…
Gotys
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Interpreting fio test result

I ran fio on a VM provided by my VPS provider and got this result: $ fio --name=random-write --ioengine=posixaio --rw=randwrite --bs=4k --numjobs=1 --size=4g --iodepth=1 --runtime=60 --time_based --end_fsync=1 [--- snipped ---] Run status group 0…
pepoluan
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LOW IOPS after MySQL RDS Upgrade

We were hitting the upper limits of our IOPs the last several days. We provisioned more IOPS a few times. 1250 -> 2500 -> 4500. Each Step we quickly saw we were using all the available IOPS as it would max out between the reads and writes. Finally…
MichaelWClark
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How should I interpret disk IOPS listed by cloud hosting providers vs. those listed by drive manufacturers?

When I look at disk (block device) storage options from various cloud hosting providers, I usually see numbers such as : Google Cloud (Zonal SSD) : 15.000 - 100.000 read IOPS OVH Cloud : (High Speed / SSD ) : Up to 3.000 IOPS AWS : (io1 / SSD) : Up…
sbrattla
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How much IOPS is recommended for large file read and write

How to select the number of IOPS required for processing a large file (hundreds of GB) in Azure Hybrid Disk? I am using Azure blob storage for storing compressed (zstd) disk image backup (1TB disk size, approx. 450 GB after compressing) and I want…
Misaz
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MySQL RDS Write IOPS high

One of my client is having RDS MySQL DB for which write IOPS is high when compared to read IOPS. Tried increasing CPU and Memory to 8 and 61 GB respectively, but still it is the same. This is a small e-commerce application, which is not so popular.…
serverstackqns
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Low random read IOPS intel dc s4500

i have very bad read performance on my new intel ssd. My configuration is: HP proliant DL360e gen8 with Smart Array P222 controler. Intel ssd dc s4500 960GB 64GB ram 2x Intel cpu I have 2x SAS HDD 7200rpm(raid 0), 1x consumer Samsung SSD (raid 0)…
Andrej Szabo
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PerfMon within a VMware 6.5 VM in 2017: Accurate?

Looking to measure the performance of a VM over a two-week period, which means the Performance tab in vSphere client/UI is not really feasible. esxitop appears to only track the host, not a particular VM, although not sure if there's a method of…
gravyface
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How can I measure RAM/tmpfs IOPS from a specific application?

I am running a hadoop-based application (hadoop 1.2.1), where I had discovered a hard-disk bottleneck; monitoring the hard disk IOPS with iotop resulted in ~160 MB/sec, which was the writing speed I was getting by benchmarking the disk with…
Adama
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IOPS super low after creating volume from snapshot (AWS)

I'm using EC2 p2.xlarge instances to train an image processing model. My target classes for the prediction task are quite a few (20) and to get the best accuracy I'm going to train one model per target. So I did a snapshot of my main volume and…
Md Oliya
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Strange IOPS performance on AWS R3.large & R4.large instances

I have used 4 10GB GP2 EBS volumes with RAID0 on Windows Server 2012R2 image as explained here: http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/raid-config.html The instance type I used was R3.large I was expecting to see 4*3000 (12K IOPS)…
user2629636
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php-fpm with NGINX response time exponentially increase over time

I have a load balanced application on AWS, on two c4.2xlarge (8 vCPUs, 15GB ram) servers and they serve a very simplistic site but with a system call to ffmpeg encode a <5s mp4. Individually, the script takes < 1s to execute, but under stress, the…
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