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Pre-allocate block and undo files in chunks

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Introduce a AllocateFileRange() function in util, which wipes or
at least allocates a given range of a file. It can be overriden
by more efficient OS-dependent versions if necessary.

Block and undo files are now allocated in chunks of 16 and 1 MiB,
respectively.
This commit is contained in:
Pieter Wuille
2012-08-16 02:21:28 +02:00
parent 5382bcf8cd
commit bba89aa82a
4 changed files with 49 additions and 9 deletions
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src/main.h
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@@ -29,6 +29,8 @@ static const unsigned int MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50;
static const unsigned int MAX_ORPHAN_TRANSACTIONS = MAX_BLOCK_SIZE/100;
static const unsigned int MAX_INV_SZ = 50000;
static const unsigned int MAX_BLOCKFILE_SIZE = 0x8000000; // 128 MiB
static const unsigned int BLOCKFILE_CHUNK_SIZE = 0x1000000; // 16 MiB
static const unsigned int UNDOFILE_CHUNK_SIZE = 0x100000; // 1 MiB
static const int64 MIN_TX_FEE = 50000;
static const int64 MIN_RELAY_TX_FEE = 10000;
static const int64 MAX_MONEY = 21000000 * COIN;