My first attempt at using  tape spanning just failed.
Anyone can offer some guidance?

Server is an sgi with 28 cpus 28G of ram and
client is a debian Xeon quad-core with 4GB of ram.
I've setup an amanda test config for a DLE of ~200GB
supposed to be stuffed in 100GB LTO1 tapes. The dumptype
for the DLE reads:

define dumptype tar-span {
    global
    program "GNUTAR"
    priority high
    auth "bsdtcp"
    tape_splitsize 10 Gb
    compress none
    record no  
    strategy noinc
    fallback_splitsize 2 Gb
    split_diskbuffer "/holddisk/conf9/split_diskbuffer"
    comment "tape-spanning with tar"
}

Makes sense or am I using crazy values? Not sure where
split_diskbuffer lives: on the client or on the server?
The amdump reports say:

FAILURE AND STRANGE DUMP SUMMARY:
  gaspar  concussion2-span  lev 0  FAILED [dump to tape failed]
  taper: FATAL taper.c@613: memory allocation failed (2147483648 bytes 
requested)
  taper: FATAL writer: Syncpipe failure before start


STATISTICS:
                          Total       Full      Incr.
                        --------   --------   --------
Estimate Time (hrs:min)    0:02
Run Time (hrs:min)         0:07
Dump Time (hrs:min)        0:00       0:00       0:00
Output Size (meg)           0.0        0.0        0.0
Original Size (meg)         0.0        0.0        0.0
Avg Compressed Size (%)     --         --         -- 
Filesystems Dumped            0          0          0
Avg Dump Rate (k/s)         --         --         -- 

Tape Time (hrs:min)        0:00       0:00       0:00
Tape Size (meg)             0.0        0.0        0.0
Tape Used (%)               0.0        0.0        0.0
Filesystems Taped             0          0          0

Chunks Taped                  0          0          0
Avg Tp Write Rate (k/s)     --         --         -- 

USAGE BY TAPE:
  Label                  Time      Size      %    Nb    Nc
  span-test-000009       0:00        0M    0.0     0     0


NOTES:
  planner: Adding new disk gaspar:concussion2-span.
  taper: mmap failed (No such device or address): using fallback split size of 
2097152kb to buffer gaspar:concussion2-span.0 in-memory
  driver: taper pid 13744170 exited with signal 6


DUMP SUMMARY:
                                      DUMPER STATS                TAPER STATS  
HOSTNAME DISK           L ORIG-MB  OUT-MB  COMP%  MMM:SS    KB/s MMM:SS    KB/s
------------------------- -------------------------------------- --------------
gaspar   -cussion2-span 0 FAILED ----------------------------------------------

(brought to you by Amanda version 2.5.1p2)

jf
-- 
<° ><