Labyrinth of Light (Oct 06 2011)


log in

Advanced search

Message boards : Technical News : Labyrinth of Light (Oct 06 2011)

Previous · 1 · 2
Author Message
John McLeod VII
Volunteer developer
Volunteer tester
Avatar
Send message
Joined: 15 Jul 99
Posts: 24087
Credit: 517,624
RAC: 153
United States
Message 1164379 - Posted: 21 Oct 2011, 23:13:24 UTC - in response to Message 1164174.

Thank you Matt !

Just wondering, have you considered moving storage intensive tasks to PCI based flash storage ? We have had great success using them for datawarehousing.

Flash has a rather limited number of write cycles. There are some places in the architecture that may burn through the entire write cycle lifetime of a flash device in under a year. Other places have many fewer writes and may be more suitable.
____________


BOINC WIKI

Profile HAL9000
Volunteer tester
Avatar
Send message
Joined: 11 Sep 99
Posts: 3852
Credit: 106,841,782
RAC: 95,590
United States
Message 1165439 - Posted: 26 Oct 2011, 7:54:57 UTC - in response to Message 1164379.

Thank you Matt !

Just wondering, have you considered moving storage intensive tasks to PCI based flash storage ? We have had great success using them for datawarehousing.

Flash has a rather limited number of write cycles. There are some places in the architecture that may burn through the entire write cycle lifetime of a flash device in under a year. Other places have many fewer writes and may be more suitable.

At the rate the data goes though here I would give a SSD array a few months.
____________
SETI@home classic workunits: 93,865 CPU time: 863,447 hours

Join the BP6/VP6 User Group today!

Grant (SSSF)
Send message
Joined: 19 Aug 99
Posts: 5694
Credit: 56,302,332
RAC: 48,906
Australia
Message 1165710 - Posted: 27 Oct 2011, 6:36:36 UTC - in response to Message 1165439.

At the rate the data goes though here I would give a SSD array a few months.

A low capacity retail SSD, most likely. A high end retail SSD, a year or 2. An enterprise class SSD, 5+ years, easily.
____________
Grant
Darwin NT.

Dena Wiltsie
Send message
Joined: 19 Apr 01
Posts: 999
Credit: 529,734
RAC: 276
United States
Message 1166359 - Posted: 30 Oct 2011, 2:15:34 UTC - in response to Message 1165710.

At the rate the data goes though here I would give a SSD array a few months.

A low capacity retail SSD, most likely. A high end retail SSD, a year or 2. An enterprise class SSD, 5+ years, easily.

Without more information, it could be one of these.
____________

John McLeod VII
Volunteer developer
Volunteer tester
Avatar
Send message
Joined: 15 Jul 99
Posts: 24087
Credit: 517,624
RAC: 153
United States
Message 1166599 - Posted: 31 Oct 2011, 2:17:31 UTC - in response to Message 1166359.

At the rate the data goes though here I would give a SSD array a few months.

A low capacity retail SSD, most likely. A high end retail SSD, a year or 2. An enterprise class SSD, 5+ years, easily.

Without more information, it could be one of these.

I could not locate how many write cycles they are good for (unless it is the 600,000 number).
____________


BOINC WIKI

Dena Wiltsie
Send message
Joined: 19 Apr 01
Posts: 999
Credit: 529,734
RAC: 276
United States
Message 1166607 - Posted: 31 Oct 2011, 3:22:49 UTC - in response to Message 1166599.

At the rate the data goes though here I would give a SSD array a few months.

A low capacity retail SSD, most likely. A high end retail SSD, a year or 2. An enterprise class SSD, 5+ years, easily.

Without more information, it could be one of these.

I could not locate how many write cycles they are good for (unless it is the 600,000 number).

The number of cycles is not listed because they use the same RAM memory used in all computers for processor memory. While this company also make flash drives, the link points to drives that have unlimited cycles. The disadvantage is the size of the drive is smaller and the cost higher but the advantage is very high speed and a long life.
____________

John McLeod VII
Volunteer developer
Volunteer tester
Avatar
Send message
Joined: 15 Jul 99
Posts: 24087
Credit: 517,624
RAC: 153
United States
Message 1167077 - Posted: 2 Nov 2011, 1:06:30 UTC - in response to Message 1166607.

At the rate the data goes though here I would give a SSD array a few months.

A low capacity retail SSD, most likely. A high end retail SSD, a year or 2. An enterprise class SSD, 5+ years, easily.

Without more information, it could be one of these.

I could not locate how many write cycles they are good for (unless it is the 600,000 number).

The number of cycles is not listed because they use the same RAM memory used in all computers for processor memory. While this company also make flash drives, the link points to drives that have unlimited cycles. The disadvantage is the size of the drive is smaller and the cost higher but the advantage is very high speed and a long life.

OK, the contents of RAM disappears when the power goes out. So, how are they keeping the data when the computer is turned off?
____________


BOINC WIKI

Dena Wiltsie
Send message
Joined: 19 Apr 01
Posts: 999
Credit: 529,734
RAC: 276
United States
Message 1167090 - Posted: 2 Nov 2011, 3:45:01 UTC - in response to Message 1167077.

At the rate the data goes though here I would give a SSD array a few months.

A low capacity retail SSD, most likely. A high end retail SSD, a year or 2. An enterprise class SSD, 5+ years, easily.

Without more information, it could be one of these.

I could not locate how many write cycles they are good for (unless it is the 600,000 number).

The number of cycles is not listed because they use the same RAM memory used in all computers for processor memory. While this company also make flash drives, the link points to drives that have unlimited cycles. The disadvantage is the size of the drive is smaller and the cost higher but the advantage is very high speed and a long life.

OK, the contents of RAM disappears when the power goes out. So, how are they keeping the data when the computer is turned off?

Battery back up and copy to flash when the power is turned off. Some of the older systems I looked at copy to a hard drive instead.
____________

Previous · 1 · 2

Message boards : Technical News : Labyrinth of Light (Oct 06 2011)

Copyright © 2014 University of California