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t6913679: Use fallocate on LOG FILESS

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Summary: Use fallocate on LOG FILES to

Test Plan:
make check
+
===check with strace===

[arya@devvm1441 ~/rocksdb] strace -e trace=fallocate ./ldb --db=/tmp/test_new scan
fallocate(3, 01, 0, 4194304)            = 0

Reviewers: sdong, anthony, IslamAbdelRahman, kradhakrishnan, lgalanis, rven, igor

Reviewed By: igor

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D45969
This commit is contained in:
Amit Arya 2015-09-02 11:17:02 -07:00
parent aad0572f83
commit 20c44fefb7
1 changed files with 3 additions and 0 deletions
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3
util/env_posix.cc
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@ -1134,6 +1134,9 @@ class PosixEnv : public Env {
return IOError(fname, errno);
} else {
int fd = fileno(f);
#ifdef ROCKSDB_FALLOCATE_PRESENT
fallocate(fd, FALLOC_FL_KEEP_SIZE, 0, 4 * 1024 * 1024);
#endif
SetFD_CLOEXEC(fd, nullptr);
result->reset(new PosixLogger(f, &PosixEnv::gettid, this));
return Status::OK();