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@guangbochen
Created November 9, 2020 15:22
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creating a file to work with
1175000+0 records in
1175000+0 records out
601600000 bytes (602 MB) copied, 5.6939 s, 106 MB/s
Testing block size = 1k
587500+0 records in
587500+0 records out
601600000 bytes (602 MB) copied, 4.45826 s, 135 MB/s
Testing block size = 2k
293750+0 records in
293750+0 records out
601600000 bytes (602 MB) copied, 2.7107 s, 222 MB/s
Testing block size = 4k
146875+0 records in
146875+0 records out
601600000 bytes (602 MB) copied, 2.49579 s, 241 MB/s
Testing block size = 8k
73437+1 records in
73437+1 records out
601600000 bytes (602 MB) copied, 2.40372 s, 250 MB/s
Testing block size = 16k
36718+1 records in
36718+1 records out
601600000 bytes (602 MB) copied, 2.38284 s, 252 MB/s
Testing block size = 32k
18359+1 records in
18359+1 records out
601600000 bytes (602 MB) copied, 2.1024 s, 286 MB/s
Testing block size = 64k
9179+1 records in
9179+1 records out
601600000 bytes (602 MB) copied, 2.25857 s, 266 MB/s
Testing block size = 128k
4589+1 records in
4589+1 records out
601600000 bytes (602 MB) copied, 2.51931 s, 239 MB/s
Testing block size = 256k
2294+1 records in
2294+1 records out
601600000 bytes (602 MB) copied, 2.42885 s, 248 MB/s
Testing block size = 512k
1147+1 records in
1147+1 records out
601600000 bytes (602 MB) copied, 2.56342 s, 235 MB/s
Testing block size = 1M
573+1 records in
573+1 records out
601600000 bytes (602 MB) copied, 2.19747 s, 274 MB/s
Testing block size = 2M
286+1 records in
286+1 records out
601600000 bytes (602 MB) copied, 2.5556 s, 235 MB/s
Testing block size = 4M
143+1 records in
143+1 records out
601600000 bytes (602 MB) copied, 2.5616 s, 235 MB/s
Testing block size = 8M
71+1 records in
71+1 records out
601600000 bytes (602 MB) copied, 2.39332 s, 251 MB/s
creating a file to work with
1175000+0 records in
1175000+0 records out
601600000 bytes (602 MB) copied, 5.51394 s, 109 MB/s
Testing block size = 1k
587500+0 records in
587500+0 records out
601600000 bytes (602 MB) copied, 4.41001 s, 136 MB/s
Testing block size = 2k
293750+0 records in
293750+0 records out
601600000 bytes (602 MB) copied, 2.4537 s, 245 MB/s
Testing block size = 4k
146875+0 records in
146875+0 records out
601600000 bytes (602 MB) copied, 1.8454 s, 326 MB/s
Testing block size = 8k
73437+1 records in
73437+1 records out
601600000 bytes (602 MB) copied, 1.75417 s, 343 MB/s
Testing block size = 16k
36718+1 records in
36718+1 records out
601600000 bytes (602 MB) copied, 1.71727 s, 350 MB/s
Testing block size = 32k
18359+1 records in
18359+1 records out
601600000 bytes (602 MB) copied, 1.73122 s, 348 MB/s
Testing block size = 64k
9179+1 records in
9179+1 records out
601600000 bytes (602 MB) copied, 1.55967 s, 386 MB/s
Testing block size = 128k
4589+1 records in
4589+1 records out
601600000 bytes (602 MB) copied, 1.79939 s, 334 MB/s
Testing block size = 256k
2294+1 records in
2294+1 records out
601600000 bytes (602 MB) copied, 1.61278 s, 373 MB/s
Testing block size = 512k
1147+1 records in
1147+1 records out
601600000 bytes (602 MB) copied, 1.74002 s, 346 MB/s
Testing block size = 1M
573+1 records in
573+1 records out
601600000 bytes (602 MB) copied, 1.64786 s, 365 MB/s
Testing block size = 2M
286+1 records in
286+1 records out
601600000 bytes (602 MB) copied, 1.6444 s, 366 MB/s
Testing block size = 4M
143+1 records in
143+1 records out
601600000 bytes (602 MB) copied, 1.62372 s, 371 MB/s
Testing block size = 8M
71+1 records in
71+1 records out
601600000 bytes (602 MB) copied, 1.73589 s, 347 MB/s
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