muthukumar...@gmail.com wrote:
> Full_Name: Muthukumar
> Version: LMDB 0.82
> OS: OSX
> URL: ftp://ftp.openldap.org/incoming/
> Submission from: (NULL) (49.207.184.177)
> 
> 
> # Writer
> 
> ```
> import lmdb
> 
> db_path = "test.db"
> DB_MAX_SIZE = 40 * 1000 * 1000 * 1000
> env = lmdb.Environment(db_path, DB_MAX_SIZE, sync=True)
> txn = env.begin(write=True, buffers=True)
> for i in xrange(5000000):
>      value = "*" * 100
>      txn.put("i="+str(i), value)
> txn.commit()
> ```
> 
> I ran the above python program in my machine which took almost 8 secs to
> complete. Simultaneously i try to copy the database using mdb_copy, but it
> started copying only after the write program completes its execution.
> 
> Please note: First i run the writer program then the mdb_copy, if i start
> mdb_copy first it runs smoothly.
> 
> Please help.

The ITS is for bug reports, not help requests. Use the openldap-technical 
mailing list for assistance.

The mdb_copy program needs to acquire the DB write mutex before executing, to 
ensure it gets a consistent snapshot. It obviously can't do that until any 
other active writer finishes.

Closing this ITS.
-- 
   -- Howard Chu
   CTO, Symas Corp.           http://www.symas.com
   Director, Highland Sun     http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP  http://www.openldap.org/project/



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