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+--- Thread: RAM Cache (/showthread.php?tid=13624)
RAM Cache - Vandamguy - 02-03-2013
Thought this was a pretty cool idea for those of you with an abundance of RAM
http://www.corsair.com/blog/vengeance-32gb-memory-caching-performance-tests/?utm_source=Corsair&utm_medium=Facebook_Twitter&utm_content=SuperCache&utm_campaign=SocialMedia
its a bit advertisey with the writeup considering the source , but the principal is sound.Â
Re: RAM Cache - HeK - 02-03-2013
Until you loose power during a write cycle and corrupt any number of files....
A proper hardware ram cache uses a battery backup.
Re: RAM Cache - Vandamguy - 02-03-2013
(02-03-2013, 12:34 AM)HeK link Wrote: Until you loose power during a write cycle and corrupt any number of files....
A proper hardware ram cache uses a battery backup.
Quote:. A RAM cache allocates a chunk of your memory ... A RAM disk is very similar â however, if you lose power, everything on the RAM disk is lost forever, while the data in the RAM cache is mirrored in the hard drive or SSD.
im not sure if you missed reading that part or if everyone in this community just like shitting on each others posts
Re: RAM Cache - Didzo - 02-03-2013
(02-03-2013, 12:46 AM)Vandamdad link Wrote: [quote author=HeK link=topic=6755.msg261363#msg261363 date=1359869642]
Until you loose power during a write cycle and corrupt any number of files....
A proper hardware ram cache uses a battery backup.
Quote:. A RAM cache allocates a chunk of your memory ... A RAM disk is very similar â however, if you lose power, everything on the RAM disk is lost forever, while the data in the RAM cache is mirrored in the hard drive or SSD.
im not sure if you missed reading that part or if everyone in this community just like shitting on each others posts
[/quote]
Yes.
Re: RAM Cache - HeK - 02-03-2013
I see Vandam deleted his account, possible rage quit?
The author of the article does not fully understand how caching works, or the problems associated with it.
In simple terms, when you read or write a file, it is copied from your slow HDD/SSD to your fast memory. Changes are made in memory on demand and transferred between the memory cache and your drive later, when speed isn't important. This is called a transaction delay. The ram cache makes use of read ahead, transaction logs to buffer the most commonly accessed blocks from your drives, this means core files from your OS like your registry. So, when changes are made in the cache there is a window where the ram cache does not match what is stored on the drive. If power is lost before the write is complete, the files become corrupted. This is why proper drive controllers with ram caches have battery backups, so that the writes can be completed when power is restored.
Source: I admin multiple petabyte sized fibrechannel disk arrays.
Re: RAM Cache - at0m - 02-04-2013
What a terribly inane thing to ragequit over. You weren't even being nasty about it.
I tried using a RAMDisk at one point to play around with emulating an OS a long time ago, but I haven't really thought about it since. Haven't really felt the need, as the risks did not outweigh the rewards. The same reasoning applies in my mind to Raid-0 arrays of anything, really.
Re: RAM Cache - Versus - 02-04-2013
i'm sure he'll enjoy spending even more time on reddit