CODEWITHSUNDEEP
appendattrleveldbrocksdb
v217
v217

Reputation: 805

What files in the LevelDB folder are append-only?

In my LevelDB-folder at some stage I have the following files:

000004.log  000005.ldb  CURRENT  LOCK  LOG  MANIFEST-000002

I don't think they are all append-only? So it's certainly not possible to run " chattr +a * " on all files in the database folder, because some are deleted, while running leveldb. My question is which files won't be deleted and are append only during a normal LevelDB session and during compaction and are those files which are deleted before deletion append-only?

Upvotes: 2

Views: 1232

Answers (1)

sel-fish
sel-fish

Reputation: 4486

*.log: append-only while WAL, the filename will change
.ldb: static once generate, the filename will change
MANIFEST-: static once generate, the suffix will change
LOG: append-only, rotate per day by default
CURRENT: rewrite after version change
LOCK: only change when open or close

to answer your question:

Q1: is which files won't be deleted and are append only during a normal LevelDB session?
A1: No, there isn't such file(maybe LOG, but it will rotate)

Q2: are those files which are deleted before deletion append-only
A2: *.log is append only before deletion

Upvotes: 3

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