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MCOL-498. Add the knob to disable segment|dict file preallocation. Dict files extension uses fallocate() if possible.

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This commit is contained in:
Roman Nozdrin
2018-03-06 14:20:46 +03:00
parent 1d9f47a55c
commit 81fe7fa1a9
9 changed files with 230 additions and 130 deletions
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12
utils/idbdatafile/IDBPolicy.h
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@ -80,6 +80,11 @@ public:
*/
static bool useHdfs();
/**
* Accessor method that returns whether or not HDFS is enabled
*/
static bool PreallocSpace();
/**
* Accessor method that returns whether to use HDFS memory buffers
*/
@ -134,6 +139,7 @@ private:
static bool isLocalFile( const std::string& path );
static bool s_usehdfs;
static bool s_PreallocSpace;
static bool s_bUseRdwrMemBuffer;
static std::string s_hdfsRdwrScratch;
static int64_t s_hdfsRdwrBufferMaxSize;
@ -153,6 +159,12 @@ bool IDBPolicy::useHdfs()
return s_usehdfs;
}
inline
bool IDBPolicy::PreallocSpace()
{
return s_PreallocSpace;
}
inline
bool IDBPolicy::useRdwrMemBuffer()
{