Latency of SSDs versus HDDs
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We are currently using an HDD for our NetApp storage for our VMs. We're considering replacing them with SSDs, but many disk manufacturers have different performance. What range of latencies can we expect from SSDs versus HDDs? How much better are SSDs on average?
hard-drive performance ssd latency
asked Mar 16 at 20:15
King DavidKing David
2241212
migrated from unix.stackexchange.com Mar 16 at 22:07
This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.
add a comment |
We are currently using an HDD for our NetApp storage for our VMs. We're considering replacing them with SSDs, but many disk manufacturers have different performance. What range of latencies can we expect from SSDs versus HDDs? How much better are SSDs on average?
hard-drive performance ssd latency
asked Mar 16 at 20:15
King DavidKing David
2241212
migrated from unix.stackexchange.com Mar 16 at 22:07
This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.
add a comment |
We are currently using an HDD for our NetApp storage for our VMs. We're considering replacing them with SSDs, but many disk manufacturers have different performance. What range of latencies can we expect from SSDs versus HDDs? How much better are SSDs on average?
hard-drive performance ssd latency
asked Mar 16 at 20:15
King DavidKing David
2241212
We are currently using an HDD for our NetApp storage for our VMs. We're considering replacing them with SSDs, but many disk manufacturers have different performance. What range of latencies can we expect from SSDs versus HDDs? How much better are SSDs on average?
hard-drive performance ssd latency
hard-drive performance ssd latency
asked Mar 16 at 20:15
King DavidKing David
2241212
asked Mar 16 at 20:15
King DavidKing David
2241212
asked Mar 16 at 20:15
King DavidKing David
2241212
asked Mar 16 at 20:15
King DavidKing David
2241212
asked Mar 16 at 20:15
King DavidKing David
2241212
2241212
migrated from unix.stackexchange.com Mar 16 at 22:07
This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.
migrated from unix.stackexchange.com Mar 16 at 22:07
This question came from our site for users of Linux, FreeBSD and other Un*x-like operating systems.
add a comment |
add a comment |
1 Answer
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The latencies of an SSD vary hugely, but in terms of IOPs (which us probably the term you want to google)you are looking at an increase in the order of 2-5 magnitudes. (Ie 100 iops for HDD, starting at more then 10000 + for an SSD).
Have a look at https://en.m.wikipedia.org/wiki/IOPS
SSDs are like a night and day difference. I would only use hdds for backups and unimportant archival data - like videos, music collections. A heavily swapping HDD can render a system unuseable - while it will just be a bit sluggish on SSD.
Speedwise SSDs are at least 5 times as fast in sequential reads and writes - which represents the closest benchmark
You did not ask, but SSD is also over 5 times as reliable as hdd (but unlike hdd more likely to fail completely and without warning - so RAID is still important)
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
If you reread my answer, you will see that I did. SSDs start at 5 times more throughput and go up from there
– davidgo
Mar 17 at 6:20
another question please , lets say I have HHD disks , and by dmidecode , I get all disks details , can we according to the info from dmidecode find the iops? , if not maybe other linux command ?
– King David
Mar 17 at 6:40
BTW - you said " latencies of an SSD vary hugely" but how it can be while iops is very good and latency is hudely?
– King David
Mar 17 at 6:44
No. DMICode does not tell you about performance or provide particularly detailed info about disks. The only useful information it will provide is about the.motherboard/system model which can tell us something about the sata.controller and what types.of SSDs we can use. Smartctl and hdparm can provide the disk make and model and the iops can be lpoked up in its specs.
– davidgo
Mar 17 at 6:45
By latencies I assume you mean IOPS (or some derivative thereof). These vary from 10k/sec to over 1m/sec
– davidgo
Mar 17 at 6:47
|
show 4 more comments
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1 Answer
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1 Answer
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The latencies of an SSD vary hugely, but in terms of IOPs (which us probably the term you want to google)you are looking at an increase in the order of 2-5 magnitudes. (Ie 100 iops for HDD, starting at more then 10000 + for an SSD).
Have a look at https://en.m.wikipedia.org/wiki/IOPS
SSDs are like a night and day difference. I would only use hdds for backups and unimportant archival data - like videos, music collections. A heavily swapping HDD can render a system unuseable - while it will just be a bit sluggish on SSD.
Speedwise SSDs are at least 5 times as fast in sequential reads and writes - which represents the closest benchmark
You did not ask, but SSD is also over 5 times as reliable as hdd (but unlike hdd more likely to fail completely and without warning - so RAID is still important)
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
If you reread my answer, you will see that I did. SSDs start at 5 times more throughput and go up from there
– davidgo
Mar 17 at 6:20
another question please , lets say I have HHD disks , and by dmidecode , I get all disks details , can we according to the info from dmidecode find the iops? , if not maybe other linux command ?
– King David
Mar 17 at 6:40
BTW - you said " latencies of an SSD vary hugely" but how it can be while iops is very good and latency is hudely?
– King David
Mar 17 at 6:44
No. DMICode does not tell you about performance or provide particularly detailed info about disks. The only useful information it will provide is about the.motherboard/system model which can tell us something about the sata.controller and what types.of SSDs we can use. Smartctl and hdparm can provide the disk make and model and the iops can be lpoked up in its specs.
– davidgo
Mar 17 at 6:45
By latencies I assume you mean IOPS (or some derivative thereof). These vary from 10k/sec to over 1m/sec
– davidgo
Mar 17 at 6:47
|
show 4 more comments
The latencies of an SSD vary hugely, but in terms of IOPs (which us probably the term you want to google)you are looking at an increase in the order of 2-5 magnitudes. (Ie 100 iops for HDD, starting at more then 10000 + for an SSD).
Have a look at https://en.m.wikipedia.org/wiki/IOPS
SSDs are like a night and day difference. I would only use hdds for backups and unimportant archival data - like videos, music collections. A heavily swapping HDD can render a system unuseable - while it will just be a bit sluggish on SSD.
Speedwise SSDs are at least 5 times as fast in sequential reads and writes - which represents the closest benchmark
You did not ask, but SSD is also over 5 times as reliable as hdd (but unlike hdd more likely to fail completely and without warning - so RAID is still important)
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
If you reread my answer, you will see that I did. SSDs start at 5 times more throughput and go up from there
– davidgo
Mar 17 at 6:20
another question please , lets say I have HHD disks , and by dmidecode , I get all disks details , can we according to the info from dmidecode find the iops? , if not maybe other linux command ?
– King David
Mar 17 at 6:40
BTW - you said " latencies of an SSD vary hugely" but how it can be while iops is very good and latency is hudely?
– King David
Mar 17 at 6:44
No. DMICode does not tell you about performance or provide particularly detailed info about disks. The only useful information it will provide is about the.motherboard/system model which can tell us something about the sata.controller and what types.of SSDs we can use. Smartctl and hdparm can provide the disk make and model and the iops can be lpoked up in its specs.
– davidgo
Mar 17 at 6:45
By latencies I assume you mean IOPS (or some derivative thereof). These vary from 10k/sec to over 1m/sec
– davidgo
Mar 17 at 6:47
|
show 4 more comments
The latencies of an SSD vary hugely, but in terms of IOPs (which us probably the term you want to google)you are looking at an increase in the order of 2-5 magnitudes. (Ie 100 iops for HDD, starting at more then 10000 + for an SSD).
Have a look at https://en.m.wikipedia.org/wiki/IOPS
SSDs are like a night and day difference. I would only use hdds for backups and unimportant archival data - like videos, music collections. A heavily swapping HDD can render a system unuseable - while it will just be a bit sluggish on SSD.
Speedwise SSDs are at least 5 times as fast in sequential reads and writes - which represents the closest benchmark
You did not ask, but SSD is also over 5 times as reliable as hdd (but unlike hdd more likely to fail completely and without warning - so RAID is still important)
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
The latencies of an SSD vary hugely, but in terms of IOPs (which us probably the term you want to google)you are looking at an increase in the order of 2-5 magnitudes. (Ie 100 iops for HDD, starting at more then 10000 + for an SSD).
Have a look at https://en.m.wikipedia.org/wiki/IOPS
SSDs are like a night and day difference. I would only use hdds for backups and unimportant archival data - like videos, music collections. A heavily swapping HDD can render a system unuseable - while it will just be a bit sluggish on SSD.
Speedwise SSDs are at least 5 times as fast in sequential reads and writes - which represents the closest benchmark
You did not ask, but SSD is also over 5 times as reliable as hdd (but unlike hdd more likely to fail completely and without warning - so RAID is still important)
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
edited Mar 17 at 1:33
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
answered Mar 17 at 1:27
davidgodavidgo
44.9k75392
44.9k75392
If you reread my answer, you will see that I did. SSDs start at 5 times more throughput and go up from there
– davidgo
Mar 17 at 6:20
another question please , lets say I have HHD disks , and by dmidecode , I get all disks details , can we according to the info from dmidecode find the iops? , if not maybe other linux command ?
– King David
Mar 17 at 6:40
BTW - you said " latencies of an SSD vary hugely" but how it can be while iops is very good and latency is hudely?
– King David
Mar 17 at 6:44
No. DMICode does not tell you about performance or provide particularly detailed info about disks. The only useful information it will provide is about the.motherboard/system model which can tell us something about the sata.controller and what types.of SSDs we can use. Smartctl and hdparm can provide the disk make and model and the iops can be lpoked up in its specs.
– davidgo
Mar 17 at 6:45
By latencies I assume you mean IOPS (or some derivative thereof). These vary from 10k/sec to over 1m/sec
– davidgo
Mar 17 at 6:47
|
show 4 more comments
If you reread my answer, you will see that I did. SSDs start at 5 times more throughput and go up from there
– davidgo
Mar 17 at 6:20
another question please , lets say I have HHD disks , and by dmidecode , I get all disks details , can we according to the info from dmidecode find the iops? , if not maybe other linux command ?
– King David
Mar 17 at 6:40
BTW - you said " latencies of an SSD vary hugely" but how it can be while iops is very good and latency is hudely?
– King David
Mar 17 at 6:44
No. DMICode does not tell you about performance or provide particularly detailed info about disks. The only useful information it will provide is about the.motherboard/system model which can tell us something about the sata.controller and what types.of SSDs we can use. Smartctl and hdparm can provide the disk make and model and the iops can be lpoked up in its specs.
– davidgo
Mar 17 at 6:45
By latencies I assume you mean IOPS (or some derivative thereof). These vary from 10k/sec to over 1m/sec
– davidgo
Mar 17 at 6:47
If you reread my answer, you will see that I did. SSDs start at 5 times more throughput and go up from there
– davidgo
Mar 17 at 6:20
If you reread my answer, you will see that I did. SSDs start at 5 times more throughput and go up from there
– davidgo
Mar 17 at 6:20
another question please , lets say I have HHD disks , and by dmidecode , I get all disks details , can we according to the info from dmidecode find the iops? , if not maybe other linux command ?
– King David
Mar 17 at 6:40
another question please , lets say I have HHD disks , and by dmidecode , I get all disks details , can we according to the info from dmidecode find the iops? , if not maybe other linux command ?
– King David
Mar 17 at 6:40
BTW - you said " latencies of an SSD vary hugely" but how it can be while iops is very good and latency is hudely?
– King David
Mar 17 at 6:44
BTW - you said " latencies of an SSD vary hugely" but how it can be while iops is very good and latency is hudely?
– King David
Mar 17 at 6:44
No. DMICode does not tell you about performance or provide particularly detailed info about disks. The only useful information it will provide is about the.motherboard/system model which can tell us something about the sata.controller and what types.of SSDs we can use. Smartctl and hdparm can provide the disk make and model and the iops can be lpoked up in its specs.
– davidgo
Mar 17 at 6:45
No. DMICode does not tell you about performance or provide particularly detailed info about disks. The only useful information it will provide is about the.motherboard/system model which can tell us something about the sata.controller and what types.of SSDs we can use. Smartctl and hdparm can provide the disk make and model and the iops can be lpoked up in its specs.
– davidgo
Mar 17 at 6:45
By latencies I assume you mean IOPS (or some derivative thereof). These vary from 10k/sec to over 1m/sec
– davidgo
Mar 17 at 6:47
By latencies I assume you mean IOPS (or some derivative thereof). These vary from 10k/sec to over 1m/sec
– davidgo
Mar 17 at 6:47
|
show 4 more comments
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