Pierre-Emmanuel Brinette Oracle T10K-C Pierre-Emmanuel Brinette

DISCLAIMER Information are stolen from a CERN benchmark report made by Vladimír Bahyl (w/o authorization) 17-18 may 2011

Dual heads writing 32 tracks simultaneously; T10K-C vs T10K-B Extract of features relevant for CERN T10000C T10000B Tape Format Linear Serpentine Native cartridge capacity (uncompressed) 5 TB 1 TB Head design Dual heads writing 32 tracks simultaneously; GMR readers AMR readers Native data rate performance (uncompressed) Up to 240 MB/sec Up to 120 MB/sec Full tape length 1146 m 917 m Tape speed (low / high / locate) 3.74 / 5.62 / 10-13 m/s 2 / 3.7 / 8-12 m/s Internal data buffer 2 GB 256 MB Small files handling functionality File Sync Accelerator None Max Capacity Feature Yes 17-18 may 2011

Comments New media “Max capacity” features T10000-T2 Backward compatibility with T10000-T1 for readings only “Sport Tape” (ie: short tape) available “Max capacity” features Use the physical End Of Tape mark instead the logical one Increase tape capacity by ~ 10% Cern report usable capacity of 5510 Gb / Tape This features already available on T10K-B 17-18 may 2011

17-18 may 2011

17-18 may 2011

Drives are still expensive Storage cost similar to LT04 (800 Gb) €€€€ Drives are still expensive T10K-C ~ 14.000 € Storage cost similar to LT04 (800 Gb) LTO4 (800GB): 0.033 € / GB T10K-B (1TB): 0.069 € / GB T10K-C (5TB): 0.037 € / GB Library usage optimized Up to 50 PB on a standard SL8500 ! 17-18 may 2011

HPSS will support T10K-C in v 7.3.3 Time to fill a tape : Comments HPSS will support T10K-C in v 7.3.3 Patch already available for v 7.3.2 Time to fill a tape : @ 240 MB/s : ~ 5h30 @ 50 MB/s : 27h00 ! Questions : How the “File Sync Accelerator” could replace the HPSS file aggregation feature for small files. HPSS ready to handle tapes with more than 100.000 files ? 17-18 may 2011