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Re: [Wb-discuss] Re: Wb-discuss Digest, Vol 5, Issue 3
From: |
Aubrey Jaffer |
Subject: |
Re: [Wb-discuss] Re: Wb-discuss Digest, Vol 5, Issue 3 |
Date: |
Fri, 16 Apr 2010 15:21:04 -0400 (EDT) |
| Date: Fri, 16 Apr 2010 14:27:25 -0400
| From: zhang xin cheng <address@hidden>
|
| I have some problem regarding the remove. I do some test to add
| 1000 items in the btree, and remove them, I use bt-get and check
| all things have been removed, however, the size of the file which
| store the btree has not decrease.
WB does not shrink its files because it doesn't move blocks; it could
shrink the file only if the blocks deleted happened to be consecutive
at the end of the file.
What might be a more useful behavior is if WB were to fill unused
blocks with zeros; that way, the unused blocks would not occupy any
space on disk (at least in unix filesystems). However, the reported
file lengths would not be affected.