recommended micro sd card ?

[xalius]

Testing Linux pine64 4.7.0-rc1firebuild-MMC #1 SMP PREEMPT Sun Jul 24 11:56:29 CDT 2016 aarch64 GNU/Linux

Code:

debian@pine64:~$ iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
        Iozone: Performance Test of File I/O
                Version $Revision: 3.429 $
                Compiled for 64 bit mode.
                Build: linux

        Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
                     Al Slater, Scott Rhine, Mike Wisner, Ken Goss
                     Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
                     Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner,
                     Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone,
                     Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root,
                     Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer,
                     Vangel Bojaxhi, Ben England, Vikentsi Lapa.

        Run began: Sun Jul 24 17:19:09 2016

        Include fsync in write timing
        O_DIRECT feature enabled
        Auto Mode
        File size set to 102400 kB
        Record Size 4 kB
        Record Size 16 kB
        Record Size 512 kB
        Record Size 1024 kB
        Record Size 16384 kB
        Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
        Output is in kBytes/sec
        Time Resolution = 0.000001 seconds.
        Processor cache size set to 1024 kBytes.
        Processor cache line size set to 32 bytes.
        File stride size set to 17 * record size.
                                                              random    random     bkwd    record    stride
              kB  reclen    write  rewrite    read    reread    read     write     read   rewrite      read   fwrite frewrite    fread  freread
          102400       4     1610     2793     5949     5955     5940     2852
          102400      16     7435     7585     9155     9176     9175     7645
          102400     512    11091    11199    11644    11624    11633    11122
          102400    1024    11205    11258    11668    11651    11664    11264
          102400   16384    11045    11297    11684    11681    11685    11304

iozone test complete.

For comparison with the latest BSP 3.10.x kernel (102-2):

Code:

ubuntu@pine64:~$ iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
       Iozone: Performance Test of File I/O
               Version $Revision: 3.429 $
               Compiled for 64 bit mode.
               Build: linux

       Run began: Sat Jun 18 11:29:59 2016

       Include fsync in write timing
       O_DIRECT feature enabled
       Auto Mode
       File size set to 102400 kB
       Record Size 4 kB
       Record Size 16 kB
       Record Size 512 kB
       Record Size 1024 kB
       Record Size 16384 kB
       Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2
       Output is in kBytes/sec
       Time Resolution = 0.000001 seconds.
       Processor cache size set to 1024 kBytes.
       Processor cache line size set to 32 bytes.
       File stride size set to 17 * record size.
                                                             random    random     bkwd    record    stride
             kB  reclen    write  rewrite    read    reread    read     write     read   rewrite      read   fwrite frewrite    fread  freread
         102400       4     2319     3321     7347     7363     7357     3526
         102400      16    10166    12550    14464    14432    14471    12570
         102400     512    21591    21566    23143    23140    23139    21616
         102400    1024    21653    21565    23097    23100    23098    21645
         102400   16384    21678    21662    23084    23082    23082    21690

iozone test complete