Like I answered this morning to the same question: StoreFile is just a wrapper for HFile to add HBase-sugar on top of it.
J-D On Wed, Sep 1, 2010 at 7:59 AM, Himanshu Vashishtha <hvash...@cs.ualberta.ca> wrote: > It will be great if anyone can point out the difference in their > functionality. What I understand is Storefile is made persistent in fs, > compactions occurred on these (to me, its an equivalent of SSTable). > Hfile is derived (evolved) from MapFile, giving access to faster random > reads (as it uses index to look for a key etc). Is it a handler sort of to > access the persisted Storefile? By their package structure, i think so > (Hfile is in io, storefile is in rs). > > Now, the interesting thing is I know I am possibly wrong. As Ryan pointed > out recently:"Hfiles are write once read many. Once written they cannot be > modified so there is way to move things around."... > This is a SSTable property: they are immutable. And they are merged into one > by compactions (major). > > I will appreciate if you can provide the missing link. > > Thanks, > ~Himanshu >
