It doesn't seems to be a loop, it says "We use hash and splay tree, make the tag_add and tag_delete commands very quickly, and save memory as much as possible."
On Fri, May 9, 2008 at 2:44 PM, Dustin Sallings <[EMAIL PROTECTED]> wrote: > > On May 9, 2008, at 9:52, John Kramlich wrote: > > Is anyone using the variant of memcached v 1.2.4 that supports tagging > found at the following URLhttp://code.google.com/p/memcached-tag/ ? I am > in the planning stages of major feature additions to my web application and > would really like to use this version. I'm looking for feedback from others > who have used it. Is it stable enough for production use? Any issues? > > > I think tagging is a generally useful feature, but we honestly haven't put > a lot of effort into reviewing the tag code. > > In particular, we want tagging to be cheap on both setting and > invalidating. If either operation has to perform more than a single lookup, > then it may not be desirable. In particular, deleting by tag is a loop > (within a lock and with another nested loop within it), which may cause the > server to hang for long periods of time when invalidating a widely-used tag. > It *should* be possible to do this without such a loop. > > -- > Dustin Sallings > >
