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66 lines
2.9 KiB
Text
66 lines
2.9 KiB
Text
The examples includes a pair of programs that can be compiled to use either the Berkeley DB library or the Tokutek Fractal Tree index library.
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Note: The file formats are different from TokuDB and Berkley DB. Thus
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you cannot access a database created by Berkeley DB using the Tokutek
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DB, or vice-versa.
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db-insert is a program that inserts random key-value pairs into a database.
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db-scan is a program that scans through the key-value pairs, reading every row, from a database.
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To build it and run it (it's been tested on Fedora 10):
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$ make (Makes the binaries)
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Run the insertion workload under TokuDB:
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$ ./db-insert
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Run the insertion workload under BDB:
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$ ./db-insert-bdb
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Here is what the output looks like (this on a Thinkpad X61s laptop
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running Fedora 10). BDB is a little faster for sequential insertions
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(the first three columns), but much much slower for random insertions
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(the next 3 columns), so that TokuDB is faster on combined workload.
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$ ./db-insert
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serial and random insertions of 1048576 per batch
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serial 2.609965s 401759/s random 10.983798s 95466/s cumulative 13.593869s 154272/s
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serial 3.053433s 343409/s random 12.008670s 87318/s cumulative 28.656115s 146367/s
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serial 5.198312s 201715/s random 15.087426s 69500/s cumulative 48.954605s 128516/s
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serial 6.096396s 171999/s random 13.550688s 77382/s cumulative 68.638321s 122215/s
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Shutdown 4.025110s
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Total time 72.677498s for 8388608 insertions = 115422/s
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$ ./db-insert-bdb
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serial and random insertions of 1048576 per batch
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serial 2.623888s 399627/s random 8.770850s 119552/s cumulative 11.394805s 184045/s
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serial 3.081946s 340232/s random 21.046589s 49822/s cumulative 35.523434s 118071/s
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serial 14.160498s 74049/s random 497.117523s 2109/s cumulative 546.804504s 11506/s
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serial 1.534212s 683462/s random 1128.525146s 929/s cumulative 1676.863892s 5003/s
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Shutdown 195.879242s
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Total time 1872.746582s for 8388608 insertions = 4479/s
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The files are smaller for TokuDB than BDB.
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$ ls -lh bench.tokudb/
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total 39M
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-rwxrwxr-x 1 bradley bradley 39M 2009-07-28 15:36 bench.db
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$ ls -lh bench.bdb/
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total 322M
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-rw-r--r-- 1 bradley bradley 322M 2009-07-28 16:14 bench.db
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When scanning the table, one can run out of locks with BDB. There are ways around it (increase the lock table size).
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$ ./db-scan-bdb --nox
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Lock table is out of available object entries
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db-scan-bdb: db-scan.c:177: scanscan_hwc: Assertion `r==(-30988)' failed.
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Aborted
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TokuDB is fine on a big table scan.
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$ ./db-scan --nox
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Scan 33162304 bytes (2072644 rows) in 7.924463s at 4.184801MB/s
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Scan 33162304 bytes (2072644 rows) in 3.062239s at 10.829431MB/s
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0:3 1:53 2:56
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miss=3 hit=53 wait_reading=0 wait=0
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VmPeak: 244668 kB
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VmHWM: 68096 kB
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VmRSS: 1232 kB
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There isn't much documentation for the Tokutek Fractal Tree index library, but most of the API is like Berkeley DB's.
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