From ad9a39c9b49b6df97c165130a843899535548826 Mon Sep 17 00:00:00 2001
From: Igor Canadi <icanadi@fb.com>
Date: Wed, 26 Mar 2014 09:37:53 -0700
Subject: [PATCH] [RocksDB] Preallocate new MANIFEST files

Summary: We don't preallocate MANIFEST file, even though we have an option for that. This diff preallocates manifest file every time we create it

Test Plan: make check

Reviewers: dhruba, haobo

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D17163
---
 db/version_set.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/db/version_set.cc b/db/version_set.cc
index 913263ee0..a97686cda 100644
--- a/db/version_set.cc
+++ b/db/version_set.cc
@@ -1554,6 +1554,8 @@ Status VersionSet::LogAndApply(VersionEdit* edit, port::Mutex* mu,
           DescriptorFileName(dbname_, pending_manifest_file_number_),
           &descriptor_file, env_->OptimizeForManifestWrite(storage_options_));
       if (s.ok()) {
+        descriptor_file->SetPreallocationBlockSize(
+            options_->manifest_preallocation_size);
         descriptor_log_.reset(new log::Writer(std::move(descriptor_file)));
         s = WriteSnapshot(descriptor_log_.get());
       }