Is there a lot disparity between flash caching software products available today? For example, how does flash caching...
software from companies like Velobit and Nevex compare to flash cache products from major storage vendors like EMC and NetApp?
Yes, there are huge differences. The majority of caching software is block-based (such as Velobit), meaning it is used with SAN storage. It caches blocks based on an algorithm. That algorithm can be based on frequency of access where it puts the data into the cache when it meets certain frequency levels and takes it out when those levels drop.
Some algorithms are based on data age. New data is always placed in the cache. As it ages, it's purged. Some caching software even allows specific data to be "pinned" in the cache so that it is always there. The only file-level caching software is Nevex (recently acquired by Intel).
Related Q&A from Marc Staimer
HDD failure can put bytes of data at risk. Is multi-copy mirroring or erasure coding the more efficient data protection approach?continue reading
While it has yet to make a large impact in the market, open source software-defined storage is becoming an option for primary data applications.continue reading
Cloud-integrated storage uses object storage as a tier to keep costs low, but migration and performance limitations are holding it back.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.