TSM LAN-free备份速度慢，DB2 250G数据需要5个小时，如何解决？

架构如图所示tsm双驱动器

b1上装有StorageAgent且其上面注册两个节点db201和db01分别用于备份db2数据库的增量归档日志 和db2数据库的完整备份

小机a1、c1通过中间的b1（装有StorageAgent）进行lan-free文件系统的增量备份，部分调度日志如下：

12/22/15   04:14:50 --- SCHEDULEREC STATUS BEGIN

12/22/15   04:14:50 Total number of objects inspected:    4,265

12/22/15   04:14:50 Total number of objects backed up:    1,160

12/22/15   04:14:50 Total number of objects updated:          0

12/22/15   04:14:50 Total number of objects rebound:          0

12/22/15   04:14:50 Total number of objects deleted:          0

12/22/15   04:14:50 Total number of objects expired:        729

12/22/15   04:14:50 Total number of objects failed:           3

12/22/15   04:14:50 Total number of bytes transferred:   10.58 GB

12/22/15   04:14:50 LanFree data bytes:                   10.56 GB

12/22/15   04:14:50 Data transfer time:                  416.66 sec

12/22/15   04:14:50 Network data transfer rate:        26,647.06 KB/sec

12/22/15   04:14:50 Aggregate data transfer rate:      14,225.82 KB/sec

12/22/15   04:14:50 Objects compressed by:                    0%

12/22/15   04:14:50 Elapsed processing time:           00:13:00

12/22/15   04:14:50 --- SCHEDULEREC STATUS END

12/22/15   04:14:50 --- SCHEDULEREC OBJECT END DIBAK 12/22/15   04:00:00

12/22/15   04:14:50 Scheduled event 'DIBAK' completed successfully.

12/22/15   04:14:50 Sending results for scheduled event 'DIBAK'.

12/22/15   04:14:50 Results sent to server for scheduled event 'DIBAK'.

=============================================================

b1上的StorageAgent目录下dsmsta.opt内容：

DEVCONFIG   devconfig.txt

TCPPORT      1500

COMMTimeout 7200

IDLETimeout 3600

SERVERNAME TSM

而devconfig.txt内容：

SET STANAME TSM_STA

SET STAPASSWORD 2dfsdsdfsdfsd

SET STAHLADDRESS 小机b1IP

DEFINE SERVER TSM HLADDRESS=tsmServerIP LLADDRESS=1500 SERVERPA=sfdfsdfsdfsdfsdfsd

=============================================================

/usr/tivoli/tsm/client/ba/bin64/dsm.sys内容：

SErvername  tsm

COMMMethod         TCPip

TCPPort            1500

TCPServeraddress   tsmServerIP

nodename        db201

passwordaccess  generate

ERRORLOGName  /usr/tivoli/tsm/client/ba/bin64/dsmerror.log

enablelanfree                   yes

lanfreetcpserveraddress         小机b1IP

LANFREECOMMMETHOD  tcpip

lanfreetcpport  1500

SErvername  tdpo

COMMMethod         TCPip

TCPPort            1500

TCPServeraddress   tsmServerIP

nodename        db01

passwordaccess generate        

ERRORLOGName  /usr/tivoli/tsm/client/api/bin64/dsmerror.log

============================================================

  /usr/tivoli/tsm/client/api/bin64/dsm.sys内容：

SErvername tdpo

COMMMethod         TCPip

TCPPort            1500

TCPServeraddress   tsmServerIP

nodename        db01

passwordaccess  generate

ERRORLOGName  /usr/tivoli/tsm/client/api/bin64/dsmerror.log

enablelanfree                   yes

LANFREECOMMMETHOD  tcpip

lanfreetcpserveraddress         小机b1IP

LANFREEtcpport     1500

现在的问题是b1上备份数据库db2 250G的数据量持续5个小时太慢了 为什么？