Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Plain View
HBase, mail # dev - disk seek in range search

Copy link to this message
disk seek in range search
Weishung Chung 2011-03-26, 15:57
Dear fellow HBase developers,

Could someone educate me and let me know how to figure out the number of
disk seeks involved in a range search (startRow to endRow specified in
Scan). Also, could anyone give me the details of all the steps involved once
the Scan for range retrieval is called? I know somehow it needs to figure
out the regionservers used in hosting the rows but I still don't have a
clear understanding the whole steps involved :( :( Also, there is a data
index block in HFile, I was wondering how the index block is utilized in
figuring out the location of all the rows.

Thank you so much for satisfying my curiosity :)

Have a good weekend and enjoy :)

Wei Shung
Jean-Daniel Cryans 2011-03-28, 16:23
Weishung Chung 2011-03-28, 16:52
Jean-Daniel Cryans 2011-03-28, 17:00