Advice for the serveur usage - L2 cache for write

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soral
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Advice for the serveur usage - L2 cache for write

Post by soral »

In the serveur usage, we don't care about the SSD disk life cycle at all, however, the IOPS is the key parameter for the enduser. And for the raid 5 or raid 10, write IOPS is reduced by 2 - 4 or more.

So it will be very important that: in the L2 cache for the write usage:
1. The data could be deferred write 10s by memory and then writen to SSD
2. the data in SSD will be writen to HDD for a longer defer duraion. However, even the power is down for the duration. We can garantee that no data will be lost.

In fact, in the real case, memory defer write will probably be rejeted because it will cause the data lost and no data lost will be permitted. L2 ssd cache for write activities is more important. (Because no data will be lost)
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Re: Advice for the serveur usage - L2 cache for write

Post by Support »

Thank you very much for your suggestion! We'll considering it.
minhgi
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Re: Advice for the serveur usage - L2 cache for write

Post by minhgi »

I think this feature is also available for the LSI Cachecade Pro 2.0. It retain and flush data back onto the hard drive once power had been restore. I am actually using the raid controller and software package on my desktop.

This a good feature to implement for Fancycache
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