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Re: How to increase write performance on ReadyNAS
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2005-01-14
03:11 PM
2005-01-14
03:11 PM
How to increase write performance on ReadyNAS
You may notice that ReadyNAS may seem a bit slow on writes using the default configuration. There is a way to increase that write performance significantly.
First, you will need a Uninterruptable Power Supply (UPS) with a USB connection. It doesn't have to be a large one, just big enough to protect the data in case of the power failure. A 250VA unit will be more than adaquate. Plug the ReadyNAS in to the power plug in on the UPS, making sure you plug in to the protected outlet. Next you need to connect the USB connection from the UPS to USB connector on ReadyNAS. Now turn it on.
Once the UPS is connected, ReadyNAS will automatically turn on the Write Cache option on drives. For further increase of writes, turn off the full journaling option. You can do that by clicking on the System button. If you don't see the System button, make sure you click on the Advanced Control button first. Then click on the Performance tab on the top. Then check the second option, Disable full data journalling for RAID 5 volumes, and click apply.
You should now see a large improvement on write performance of ReadyNAS.
First, you will need a Uninterruptable Power Supply (UPS) with a USB connection. It doesn't have to be a large one, just big enough to protect the data in case of the power failure. A 250VA unit will be more than adaquate. Plug the ReadyNAS in to the power plug in on the UPS, making sure you plug in to the protected outlet. Next you need to connect the USB connection from the UPS to USB connector on ReadyNAS. Now turn it on.
Once the UPS is connected, ReadyNAS will automatically turn on the Write Cache option on drives. For further increase of writes, turn off the full journaling option. You can do that by clicking on the System button. If you don't see the System button, make sure you click on the Advanced Control button first. Then click on the Performance tab on the top. Then check the second option, Disable full data journalling for RAID 5 volumes, and click apply.
You should now see a large improvement on write performance of ReadyNAS.
Message 1 of 42
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2005-04-27
08:00 PM
2005-04-27
08:00 PM
Re: How to increase write performance on ReadyNAS
If using write-cache and/or disabling journalling and power was to fail, what would be the likely consequences?
Message 2 of 42
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2005-04-28
01:18 PM
2005-04-28
01:18 PM
Re: How to increase write performance on ReadyNAS
If powerfails and you've enabled writecache, data in the disk writecache can be lost if not written out to the disk platters. Chance is slim, but there's a risk that you can lose up to 32MB of unwritten data if you have 4 disks with 8MB writecache each.
If powerfails and you disable journaling, upon boot, NAS will need to run a full filesystem check, which depending on volume size and usage, can be several minutes to hours.
If powerfails and you disable journaling, upon boot, NAS will need to run a full filesystem check, which depending on volume size and usage, can be several minutes to hours.
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2005-04-28
02:11 PM
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2005-09-24
03:01 PM
2005-09-24
03:01 PM
Write cache only works with a USB plugged in?
If I use the ReadyNAS 1000 in a datacenter environment (where all AC power is on a UPS), do I have to have a UPS with a USB connection in order to get write-caching to work?
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2005-09-24
03:12 PM
2005-09-24
03:12 PM
Re: How to increase write performance on ReadyNAS
No, you can turn on write caching without a USB UPS connected.
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2005-11-25
07:26 AM
2005-11-25
07:26 AM
Re: How to increase write performance on ReadyNAS
Hi all
I have a ReadyNas X6 on order, what is the expected sustained write performance improvement in turning on write cacheing ? 1 /5 /10 Mbps ?
Or is this feature only available on the ReadyNas 600?
I would like to understand the improvment to see if the increase can justify buying a UPS to enable the functionality (more kit to upset the misses 😞 ).
I would like to use the X6 to be the location that my Media Centre PC uses to record TV to - that way it can easily be accessed from other PC's, the throughput of that needs to exceed 4 Mbps sustained.
Kind regards
CBM
I have a ReadyNas X6 on order, what is the expected sustained write performance improvement in turning on write cacheing ? 1 /5 /10 Mbps ?
Or is this feature only available on the ReadyNas 600?
I would like to understand the improvment to see if the increase can justify buying a UPS to enable the functionality (more kit to upset the misses 😞 ).
I would like to use the X6 to be the location that my Media Centre PC uses to record TV to - that way it can easily be accessed from other PC's, the throughput of that needs to exceed 4 Mbps sustained.
Kind regards
CBM
Message 7 of 42
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2005-11-25
08:30 AM
2005-11-25
08:30 AM
Re: How to increase write performance on ReadyNAS
cbm wrote: Hi all
I have a ReadyNas X6 on order, what is the expected sustained write performance improvement in turning on write cacheing ? 1 /5 /10 Mbps ?
Or is this feature only available on the ReadyNas 600?
I would like to understand the improvment to see if the increase can justify buying a UPS to enable the functionality (more kit to upset the misses 😞 ).
I would like to use the X6 to be the location that my Media Centre PC uses to record TV to - that way it can easily be accessed from other PC's, the throughput of that needs to exceed 4 Mbps sustained.
Kind regards
CBM
Sustained sequential write performance for X6 is about 11-12 MB/sec (megabytes per second) without jumbo frames. With jumbo frames, it can bump up to about 16-17 MB/sec depending on your switch and PC. With the X6, it's highly recommended to run with the write cache enabled. Your performance will suffer a lot if disabled, so do get a UPS. They're actually pretty cheap these days...
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2005-11-26
03:10 AM
2005-11-26
03:10 AM
Re: How to increase write performance on ReadyNAS
Hi, thanks for the update, APC USB UPS on the way.
Out of interest is the sustained write of the ReadyNas 600 similar to the X6 or much higher
CBM
Out of interest is the sustained write of the ReadyNas 600 similar to the X6 or much higher
CBM
Message 9 of 42
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2005-11-26
12:20 PM
2005-11-26
12:20 PM
Re: How to increase write performance on ReadyNAS
cbm wrote: Hi, thanks for the update, APC USB UPS on the way.
Out of interest is the sustained write of the ReadyNas 600 similar to the X6 or much higher
CBM
The X6 is faster, by about 2MB/sec.
Message 10 of 42
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2005-12-16
06:37 AM
2005-12-16
06:37 AM
Re: How to increase write performance on ReadyNAS
I'm only getting about 4.5 MB/sec write speed out of my new X6. I've got a ups with usb port attached, write cache enabled, and I'm using gigabit network cards with a Netgear 5 port Gigabit Ethernet Switch model GS605. Read speeds appear to be satisfactory, but my write speeds are terribly low. What would you suggest?
Message 11 of 42
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2005-12-16
08:32 AM
2005-12-16
08:32 AM
Re: How to increase write performance on ReadyNAS
JReble wrote: I'm only getting about 4.5 MB/sec write speed out of my new X6. I've got a ups with usb port attached, write cache enabled, and I'm using gigabit network cards with a Netgear 5 port Gigabit Ethernet Switch model GS605. Read speeds appear to be satisfactory, but my write speeds are terribly low. What would you suggest?
Try disabling the journal. But we do recommend you have a UPS to avoid lengthy filesystem check after powerfail.
Message 12 of 42
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2005-12-16
08:37 AM
2005-12-16
08:37 AM
Re: How to increase write performance on ReadyNAS
It's already disabled. From previous posts I'm expecting 2 to 3 times this write speed. :cry:
Message 13 of 42
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2005-12-16
08:45 AM
2005-12-16
08:45 AM
Re: How to increase write performance on ReadyNAS
JReble wrote: It's already disabled. From previous posts I'm expecting 2 to 3 times this write speed. :cry:
Do a quick IOMeter test (see http://www.infrant.com/forum/viewtopic.php?t=265 ) and let me know what you get for read and write.
Message 14 of 42
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2005-12-19
05:37 AM
2005-12-19
05:37 AM
Re: How to increase write performance on ReadyNAS
Ok, ran the tests as indicated....
Write results:
Write IOps: 32.062291
MBps: 8.015573
Transactions Per Second: 32.062291
Avg Response Time: 31.183962
Read Results:
Read IOps: 102.222964
MBps: 25.55574
Transactions per Second: 102.222964
Avg. Response Time: 9.776898
Seems to be writing too slow. 😞
Write results:
Write IOps: 32.062291
MBps: 8.015573
Transactions Per Second: 32.062291
Avg Response Time: 31.183962
Read Results:
Read IOps: 102.222964
MBps: 25.55574
Transactions per Second: 102.222964
Avg. Response Time: 9.776898
Seems to be writing too slow. 😞
Message 15 of 42
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2005-12-19
08:39 AM
2005-12-19
08:39 AM
Re: How to increase write performance on ReadyNAS
Please re-run with direct-connect (no need for a cross-over cable). The ReadyNAS will show up as IP 192.168.168.168.
JReble wrote: Ok, ran the tests as indicated....
Write results:
Write IOps: 32.062291
MBps: 8.015573
Transactions Per Second: 32.062291
Avg Response Time: 31.183962
Read Results:
Read IOps: 102.222964
MBps: 25.55574
Transactions per Second: 102.222964
Avg. Response Time: 9.776898
Seems to be writing too slow. 😞
Message 16 of 42
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2005-12-19
11:24 AM
2005-12-19
11:24 AM
Re: How to increase write performance on ReadyNAS
Not using a cross over cable. Using the included patch cable from X6 to ethernet switch, straight through cables from switch to computers.
New Write results:
Write IOps: 29.746077
MBps: 7.436519
Transactions Per Second: 29.746077
Avg Response Time: 33.61286
Read Results:
Read IOps: 106.476407
MBps: 26.619102
Transactions per Second: 106.476407
Avg. Response Time: 9.3866678
I can get considerably faster speeds between my computer and a drive mapped from another computer on the network. The NAS continues to be very slow in the write department.
New Write results:
Write IOps: 29.746077
MBps: 7.436519
Transactions Per Second: 29.746077
Avg Response Time: 33.61286
Read Results:
Read IOps: 106.476407
MBps: 26.619102
Transactions per Second: 106.476407
Avg. Response Time: 9.3866678
I can get considerably faster speeds between my computer and a drive mapped from another computer on the network. The NAS continues to be very slow in the write department.
Message 17 of 42
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2005-12-19
11:31 AM
2005-12-19
11:31 AM
Re: How to increase write performance on ReadyNAS
JR - Yoh-dah was indicating you should take the switch out of the equation and connect the desktop *directly* to the readynas using a single gigabit ethernet cable.
-brendan
-brendan
Message 18 of 42
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2005-12-19
11:34 AM
2005-12-19
11:34 AM
Re: How to increase write performance on ReadyNAS
Ah...Thanks...I missread. Trying that now.
Message 19 of 42
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2005-12-19
01:41 PM
2005-12-19
01:41 PM
Re: How to increase write performance on ReadyNAS
Directly connected, same results. :cry:
Message 20 of 42
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2005-12-28
11:25 AM
2005-12-28
11:25 AM
Re: How to increase write performance on ReadyNAS
Anyone got any fresh ideas? Still pretty poor write speeds from our new X6 even directly connected to a single PC. At this point, I'm wondering if I should box it up and ship it back??
Message 21 of 42
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2006-01-03
09:07 AM
2006-01-03
09:07 AM
Re: How to increase write performance on ReadyNAS
Shall I conclude I have a defective unit then? I've got write caching enabled, directly connected and the computer senses a gigabit network connection. Still the same lousy write speeds. Does anyone else use an X6 and get decent write speed?
Message 22 of 42
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2006-01-03
09:37 AM
2006-01-03
09:37 AM
Re: How to increase write performance on ReadyNAS
JReble wrote: Shall I conclude I have a defective unit then? I've got write caching enabled, directly connected and the computer senses a gigabit network connection. Still the same lousy write speeds. Does anyone else use an X6 and get decent write speed?
Please wait for the next beta update. There will be a separate performance option to boost the write speed. ETA hopefully by tomorrow as we're working out some last kinks.
Message 23 of 42
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2006-01-03
12:33 PM
2006-01-03
12:33 PM
Re: How to increase write performance on ReadyNAS
Cool Beans....thanks.
Message 24 of 42
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2006-01-04
08:44 AM
2006-01-04
08:44 AM
Re: How to increase write performance on ReadyNAS
When it's available....where will the new beta be found for download? I was having trouble locating download links to any beta releases.
Message 25 of 42