On 05/05/10 15:12, Phil Stracchino wrote: > On 05/05/10 08:38, John Drescher wrote: > >>> Sorry my servers are on gigabit links. >>> How do you come to 9MB/s with a 100Mb link, is it not equals to 12,5 MB/s? >>> >> Overhead. >> >> >>> If it's correct on a gigabit link I would have a rate transfer of 90MB/s >>> >> You will probably get less than that if you do not use jumbo frames. >> >> I did an throughput test with iperf between 2 servers on a gigabit link and it results in a 940Mb/s transfer rate . You tell me that transfer rate will be less than 90MB/s, is there so much overhead in the application layer?
>>> and the transfer rate of the sata disks are 3Gb/s(375MB/s). >>> >> No way are your SATA drives that fast. More likely 1/4 to 1/3 of that >> speed unless all servers are using high end SSDs. >> > That. Always remember that the data transfer rates specified on disk > interfaces are the maximum burst transfer rate FROM a full disk cache or > TO an empty one. The actual sustained rates at which the physical > mechanism can read or write data to and from the platters are FAR lower. > > > ------------------------------------------------------------------------------ _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
