Hi, I am creating an email system which will handle whole company's email, mostly internal mail. There will be thousands of companies and hundreds of users per company. So I am planning to use one pool per company to store email messages. Can Ceph manage thousands or maybe hundred thousands of pools ? Could there be any slowdown at production with such design after some growth?
Every email will be stored as an individual ceph object (emails will average 512 bytes and rarely have attachments) , is it ok to store them as a ceph objects or will it be less efficient than storing multiple emails in a ceph object,? What is the optimal ceph object size to store individually, so it would be preferable to do this instead of writing through omap with leveldb? (kind of "ceph object vs omap" benchmark question) Also I will be putting mini-chat sessions between users in a ceph object, each time a user sends a message to another user, I will append the text to the ceph object, so my question is, will Ceph rewrite the whole object into a new physical location on disk when I do an append? Or will it just rewrite the block that was modified? And last questions: Which is faster, storing small key/value pairs in omap or in xattrs ? Will storing key/value pairs in xattrs result in space waste by allocating a block for zero-sized object on the OSD? (I won't write any data to the object, just use xattrs) Will appreciate very much your comments. Best Regards Nulik -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
