26%
26.01.2012
32KB < < 128KB
64
128KB < < 256KB
0
256KB < < 512KB
2
512KB < < 1MB
3
1MB < < 10MB
87
10MB < < 100MB
0
100MB < < 1GB
26%
15.02.2012
32KB < < 128KB
64
128KB < < 256KB
0
256KB < < 512KB
2
512KB < < 1MB
3
1MB < < 10MB
87
10MB < < 100MB
0
100MB < < 1GB
26%
25.03.2021
a tiny bit to 1.2MBps (Listing 6), random reads increased to almost double the throughput with a rate of 3.3MBps (Listing 7).
Listing 6
Random Write to RAID
$ sudo fio --bs=4k --ioengine
26%
19.11.2019
volume "/dev/sdb" successfully created.
Then, I verify that the volumes have been appropriately labeled:
$ sudo pvs
PV VG Fmt Attr PSize PFree
/dev/nvme0n1 lvm2 --- <232.89g <232.89g
/dev/sdb lvm2 --- <6
26%
12.09.2013
approx. US$ 600
approx. US$ 335
CPU
Via Eden X2/1GHz
Via Eden X2/1GHz
AMD G-T44R/1.2GHz
AMD G-T56N/1.6GHz
Marvell ARMADA PXA 510 v7.1
Chipset
26%
02.08.2021
);
gFlops = 2*N*N*N / (elapsedTime * 1e+9);
disp(sprintf("N = %4d, elapsed Time = %9.6f, GFlops = %9.6f ", ...
N, elapsedTime, gFlops) );
endfor
Listing 2
Double
26%
07.01.2014
.
[laytonjb@home4 TEST]$ du -sh backup.0
14M backup.0
[laytonjb@home4 TEST]$ du -sh backup.1
12M backup.1
[laytonjb@home4 TEST]$ du -sh backup.2
9.2M backup.2
[laytonjb@home4 TEST]$ du -sh backup.3
7.7M backup
25%
07.10.2014
.snap
s ntestvm1.img 5 8.0 GB 292 MB 2.4 GB 2014-03-01 11:42 982a3a 2 mar.snap
s ntestvm1.img 6 8.0 GB 128 MB 2.6 GB 2014-03-10 19:48 982a3b 2 mar2.snap
ntestvm1.img 0 8.0 GB
25%
13.12.2018
(USB 2), and a Samsung Fit Plus 32 (USB 3).
Disk Caches
The OS is not the only player in the caching business. Examining a Samsung 750 SATA SSD drive, you cannot but notice a 256MB RAM buffer [8
25%
22.05.2012
9.3 k
dhclient x86_64 12:4.1.1-25.P1.el6_2.1 sl-security 315 k
e2fsprogs x86
