Well kept reading on this subject and realized my second question may not be appropriate since this prefix salting pattern assumes that the prefix is random. I thought it was actually based off a hash that could be predetermined so you could alwasy, if needed, get to the exact row key with one get. Would there be something wrong with doing this.. ie, using a modulo of the hash of the key?
On Sat, May 17, 2014 at 8:28 PM, Software Dev <[email protected]> wrote: > I recently came across the pattern of adding a salting prefix to the > row keys to prevent hotspotting. Still trying to wrap my head around > it and I have a few questions. > > - Is there ever a reason to salt to more buckets than there are region > servers? The only reason why I think that may be beneficial is to > anticipate future growth??? > > - Is it beneficial to always hash against a known number of buckets > (ie never change the size) that way for any individual row key you can > always determine the prefix? > > - Are there any good use cases of this pattern out in the wild? > > Thanks
