invalidating a set of entries

Dustin Sallings dustin at
Thu Oct 4 18:55:03 UTC 2007

On Oct 4, 2007, at 2:36 , Venkatesh KS wrote:

> 1. Tag each entry (as discussed in the other thread) with a gen  
> count and once we want to invalidate
> incr the global gen count. While looking up, if the gen count of  
> the entry is less than the global gen count
> for a given prefix (or tag) then return null.
> 2. Each key also has a gen count as a part of the key (for a given  
> prefix or a tag). When we want to invalidate
> then bump up the gen count in the client. So all subsequent lookups  
> will fail.
> 3. Write a regex engine (or a tag feature) which will go an  
> invalidate all the entries matching a prefix or a tag.

	2 is common, but the tag invalidation is closer to #3 than #1 (as  
I'm inferring from your description of #1).

Dustin Sallings

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