On 6/22/2011 1:07 AM, Damien Picard wrote:
Hi,
I have to store some files (Images, documents, etc.) for my users in a
webapp. I use Cassandra for all of my data and I would like to know if
this is a good idea to store these files into blob on a Cassandra CF ?
Is there some contraindications, or special things to know to achieve
this ?
Thank you
--
Damien Picard
Axeiya Services : http://axeiya.com/
gwt-ckeditor : http://code.google.com/p/gwt-ckeditor/
Mon livre sur GWT : http://axeiya.com/index.php/ouvrage-gwt.html
I was thinking of doing the same thing. But, to compensate for the
bandwidth usage during the read, I was hoping to find a way for the
httpd or app server to cache the file either in RAM or on disk so
subsequent reads could just reference the in-mem cache or local hdd. I
have big data requirements, so duplicating the storage of file blobs by
adding them to the hdd would almost double my storage requirements. So,
the hdd cache would have to be limited with the LRU removed periodically.
I was thinking about making the key for each file be a relative file
path as if it were on disk. This same path could also be used as it's
actual location on disk in the local disk cache. Using a path as the
key makes it flexible in many ways if I ever change my mind and want to
store all files on disk, or when backing-up or archiving, etc..
But, I'm rusty on my apache http knowledge but I also thought there was
an apache cache mod that would use both ram and disk depending on the
frequency of use. But, I don't know if you can tell it to "cache this
blob like it's a file".
Just some thoughts.
