LSM checkpoint handle acquisition optimization

diff --git a/src/block/block_open.c b/src/block/block_open.c

index f4da5ca..eb42ddb 100644

--- a/src/block/block_open.c

+++ b/src/block/block_open.c

@@ -209,7 +209,7 @@ __wt_block_open(WT_SESSION_IMPL *session,

        block->preload_available = true;

        /* Open the underlying file handle. */

-       WT_ERR(__wt_open(session, filename, WT_FILE_TYPE_DATA, 0, &block->fh));

+       WT_ERR(__wt_open(session, filename, WT_FILE_TYPE_DATA, readonly ? WT_OPEN_READONLY : 0, &block->fh));

        /* Set the file's size. */

        WT_ERR(__wt_filesize(session, block->fh, &block->size));

#!/usr/bin/env python

import os

import wiredtiger, wttest

from suite_subprocess import suite_subprocess

from helper import simple_populate

class f(wttest.WiredTigerTestCase, suite_subprocess):

    def test_dump(self):

        dir='XXX'

        uri = 'lsm:xxx'

        simple_populate(self, uri, 'key_format=S', 100)

        os.mkdir(dir)

        self.runWt(['dump', uri], outfilename='dump.out')

        self.runWt(['-h', dir, 'load', '-f', 'dump.out'])

        self.runWt(['-h', dir, 'load', '-f', 'dump.out'])

if __name__ == '__main__':

    wttest.run()

[1459214811:933618][33847:0x803006400], file:xxx-000002.lsm,

WT_SESSION.checkpoint: xxx-000002.lsm: handle-truncate: ftruncate: Invalid argument