DPDK init problems

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chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 25, 2016, 10:25:47 AM2/25/16
to ScyllaDB users
Hello,

     So I'm trying to get scylla 0.18 to run in dpdk mode on CentOS 7. And whenever I run "sudo systemctl start scylla-server" I get "map_all_hugepages(): open failed: Permission denied" indicating the something was not run in sudo.

The error trace in particular:
 scylla[31163]: EAL: No free hugepages reported in hugepages-1048576kB 
 scylla[31163]: EAL: VFIO modules not all loaded, skip VFIO support... 
 scylla[31163]: EAL: Setting up physically contiguous memory... 
 scylla[31163]: EAL: map_all_hugepages(): open failed: Permission denied 
 scylla[31163]: EAL: Failed to mmap 2 MB hugepages 
 scylla[31163]: PANIC in rte_eal_init(): 
 scylla[31163]: Cannot init memory 
 scylla[31163]: 9: [/usr/bin/scylla() [0x4c6571]] 
 scylla[31163]: 8: [/lib64/libc.so.6(__libc_start_main+0xf5) [0x7f485a20ab15]] 
 scylla[31163]: 7: [/usr/bin/scylla() [0x47043b]] 
 scylla[31163]: 6: [/usr/bin/scylla() [0x56a9bc]] 
 scylla[31163]: 5: [/usr/bin/scylla() [0x51751f]] 
 scylla[31163]: 4: [/usr/bin/scylla() [0x57190b]] 
 scylla[31163]: 3: [/usr/bin/scylla() [0x6bfb9d]] 
 scylla[31163]: 2: [/usr/bin/scylla() [0x469f3a]] 
 scylla[31163]: 1: [/usr/bin/scylla() [0x6c5b28]] 
 systemd[1]: scylla-server.service: main process exited, code=dumped, status=6/ABRT 

--------------------------

And My /etc/sysconfig/scylla-server:

# choose following mode: virtio, dpdk, posix
NETWORK_MODE=dpdk

# tap device name(virtio)
TAP=tap0

# bridge device name (virtio)
BRIDGE=virbr0

# ethernet device name
IFNAME=$IFNAME

# setup NIC's interrupts, RPS, XPS (posix)
SET_NIC=no

# ethernet device driver (dpdk)
ETHDRV=uio_pci_generic

# ethernet device PCI ID (dpdk)
ETHPCIID=XX:XX.X

# number of hugepages
NR_HUGEPAGES=64

# user for process (must be root for dpdk)
USER=root

# group for process
GROUP=scylla

# scylla home dir
SCYLLA_HOME=/var/lib/scylla

# scylla config dir
SCYLLA_CONF=/etc/scylla

# scylla arguments (for posix mode)
#SCYLLA_ARGS="--log-to-syslog 1 --log-to-stdout 0 --default-log-level info --collectd-address=127.0.0.1:25826 --collectd=1 --collectd-poll-period 3000 --network-stack posix"

## scylla arguments (for dpdk mode)
SCYLLA_ARGS="--log-to-syslog 1 --log-to-stdout 0 -m80G --default-log-level info --collectd-address=127.0.0.1:25826 --collectd=1 --collectd-poll-period 3000 --network-stack native --dpdk-pmd"

# scylla io
SCYLLA_IO=

# setup as AMI instance
AMI=no

chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 25, 2016, 10:26:39 AM2/25/16
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Is this a red herring or how can I fix this problem?

chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 25, 2016, 3:31:57 PM2/25/16
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Solution: systemctl resets the $USER field to scylla, which I believe will overwrite the value set in /etc/systemctl/scylla-server

SYSTEMD :(

chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 25, 2016, 4:10:23 PM2/25/16
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Currently the startup process freezes  right after "Port", and I have no clue what isn't happening:
 scylla[27419]: Port 0: Enabling HW FC
 scylla[27419]: PMD: ixgbe_set_rsc(): enabling LRO mode
 scylla[27419]: PMD: ixgbe_set_rx_function(): Port[0] doesn't meet Vector Rx preconditions or RTE_IXG    BE_INC_VECTOR is not enabled
 scylla[27419]: PMD: ixgbe_set_rx_function(): LRO is requested. Using a bulk allocation version
 scylla[27419]: Checking link status
 scylla[27419]: Created DPDK device
 scylla[27419]: .....................................................................................    .....done
 scylla[27419]: Port 
[EOF]

Dor Laor

<dor@scylladb.com>
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Feb 25, 2016, 4:34:09 PM2/25/16
to ScyllaDB users, chb2mn@gmail.com
Can you please strace it?

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chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 26, 2016, 7:29:46 PM2/26/16
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Also, running it without systemctl has revealed that `Link Down` is printed after `Port`

$strace sudo scylla --network-stack native --dpdk-pmd
execve("/usr/bin/sudo", ["sudo", "scylla", "--network-stack", "native", "--dpdk-pmd"], [/* 27 vars */]) = 0
brk(0)                                  = 0x7f73c859c000
fcntl(0, F_GETFD)                       = 0
fcntl(1, F_GETFD)                       = 0
fcntl(2, F_GETFD)                       = 0
access(0x7f73c7ee23a2, F_OK)            = -1 ENOENT (No such file or directory)
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80e6000
access(0x7f73c7ee4190, R_OK)            = -1 ENOENT (No such file or directory)
open(0x7f73c7ee2ab2, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {...})                         = 0
mmap(NULL, 36286, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f73c80dd000
close(3)                                = 0
open(0x7f73c80e6640, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce7a30, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 2253384, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c7c9f000
mprotect(0x7f73c7cba000, 2097152, PROT_NONE) = 0
mmap(0x7f73c7eba000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b000) = 0x7f73c7eba000
mmap(0x7f73c7ebc000, 37448, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f73c7ebc000
close(3)                                = 0
open(0x7f73c80e6b08, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce7a00, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 2246784, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c7a7a000
mprotect(0x7f73c7a9b000, 2097152, PROT_NONE) = 0
mmap(0x7f73c7c9b000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x21000) = 0x7f73c7c9b000
mmap(0x7f73c7c9d000, 6272, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f73c7c9d000
close(3)                                = 0
open(0x7f73c80e6fd0, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce79d0, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80dc000
mmap(NULL, 2105616, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c7877000
mprotect(0x7f73c7879000, 2093056, PROT_NONE) = 0
mmap(0x7f73c7a78000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1000) = 0x7f73c7a78000
close(3)                                = 0
open(0x7f73c80dc4b0, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce79a0, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 2109744, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c7673000
mprotect(0x7f73c7676000, 2093056, PROT_NONE) = 0
mmap(0x7f73c7875000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) = 0x7f73c7875000
close(3)                                = 0
open(0x7f73c80dc978, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce7970, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 3932736, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c72b2000
mprotect(0x7f73c7468000, 2097152, PROT_NONE) = 0
mmap(0x7f73c7668000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1b6000) = 0x7f73c7668000
mmap(0x7f73c766e000, 16960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f73c766e000
close(3)                                = 0
open(0x7f73c80dce68, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce7720, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80db000
mmap(NULL, 2490888, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c7051000
mprotect(0x7f73c70b1000, 2093056, PROT_NONE) = 0
mmap(0x7f73c72b0000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5f000) = 0x7f73c72b0000
close(3)                                = 0
open(0x7f73c80db4b0, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce76f0, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 2245240, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c6e2c000
mprotect(0x7f73c6e50000, 2093056, PROT_NONE) = 0
mmap(0x7f73c704f000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x23000) = 0x7f73c704f000
close(3)                                = 0
open(0x7f73c80dba68, O_RDONLY|O_CLOEXEC) = 3
read(3, 0x7ffe43ce7690, 832)            = 832
fstat(3, {...})                         = 0
mmap(NULL, 2208864, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f73c6c10000
mprotect(0x7f73c6c26000, 2097152, PROT_NONE) = 0
mmap(0x7f73c6e26000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7f73c6e26000
mmap(0x7f73c6e28000, 13408, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f73c6e28000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80da000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80d8000
arch_prctl(ARCH_SET_FS, 0x7f73c80d8800) = 0
mprotect(0x7f73c7668000, 16384, PROT_READ) = 0
mprotect(0x7f73c6e26000, 4096, PROT_READ) = 0
mprotect(0x7f73c704f000, 4096, PROT_READ) = 0
mprotect(0x7f73c72b0000, 4096, PROT_READ) = 0
mprotect(0x7f73c7875000, 4096, PROT_READ) = 0
mprotect(0x7f73c7a78000, 4096, PROT_READ) = 0
mprotect(0x7f73c7c9b000, 4096, PROT_READ) = 0
mprotect(0x7f73c7eba000, 4096, PROT_READ) = 0
mprotect(0x7f73c8307000, 4096, PROT_READ) = 0
mprotect(0x7f73c80e7000, 4096, PROT_READ) = 0
munmap(0x7f73c80dd000, 36286)           = 0
set_tid_address(0x7f73c80d8ad0)         = 15349
set_robust_list(0x7f73c80d8ae0, 24)     = 0
rt_sigaction(SIGRTMIN, {...}, NULL, 8)  = 0
rt_sigaction(SIGRT_1, {...}, NULL, 8)   = 0
rt_sigprocmask(SIG_UNBLOCK, 0x7ffe43ce80f8, NULL, 8) = 0
getrlimit(RLIMIT_STACK, 0x7ffe43ce80e0) = 0
statfs(0x7f73c7a93c6a, {...})           = 0
statfs(0x7f73c7a93c71, 0x7ffe43ce80c0)  = -1 ENOENT (No such file or directory)
brk(0)                                  = 0x7f73c859c000
brk(0x7f73c85bd000)                     = 0x7f73c85bd000
open(0x7f73c7a93c4e, O_RDONLY)          = 3
fstat(3, {...})                         = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80e5000
read(3, 0x7f73c80e5000, 1024)           = 310
stat(0x7f73c7430e08, 0x7ffe43ce7fa0)    = -1 ENOENT (No such file or directory)
close(3)                                = 0
munmap(0x7f73c80e5000, 4096)            = 0
open(0x7f73c7a93c7a, O_RDONLY)          = 3
fstat(3, {...})                         = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80e5000
read(3, 0x7f73c80e5000, 1024)           = 754
read(3, "", 1024)                       = 0
close(3)                                = 0
munmap(0x7f73c80e5000, 4096)            = 0
open(0x7f73c7431af0, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {...})                         = 0
mmap(NULL, 106065056, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f73c06e9000
close(3)                                = 0
geteuid()                               = 1421200090
open(0x7ffe43ce7ad0, O_RDONLY|O_CLOEXEC) = 3
fstat(3, {...})                         = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73c80e5000
read(3, 0x7f73c80e5000, 4096)           = 2502
read(3, "", 4096)                       = 0
close(3)                                = 0
munmap(0x7f73c80e5000, 4096)            = 0
open(0x7f73c859d100, O_RDONLY)          = -1 ENOENT (No such file or directory)
open(0x7f73c859e190, O_RDONLY)          = -1 ENOENT (No such file or directory)
open(0x7f73c859d190, O_RDONLY)          = -1 ENOENT (No such file or directory)
open(0x7f73c859e110, O_RDONLY)          = -1 ENOENT (No such file or directory)
open(0x7f73c859e220, O_RDONLY)          = -1 ENOENT (No such file or directory)
open(0x7f73c859d210, O_RDONLY)          = -1 ENOENT (No such file or directory)
write(2, 0x7ffe43ce96e8, 4sudo)             = 4
write(2, 0x7f73c8101897, 2: )             = 2
write(2, 0x7ffe43ce5810, 54effective uid is not 0, is sudo installed setuid root?)            = 54
write(2, 0x7f73c766d243, 1
)             = 1
close(0)                                = 0
access(0x7f73c742fd27, F_OK)            = -1 ENOENT (No such file or directory)
open(0x7f73c742fd36, O_RDONLY|O_CLOEXEC) = 0
lseek(0, 0, SEEK_SET)                   = 0
alarm(0)                                = 0
rt_sigaction(SIGALRM, {...}, {...}, 8)  = 0
alarm(10)                               = 0
fcntl(0, F_SETLKW, {...})               = 0
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, 0x7f73c76719a0, 384)            = 384
read(0, "", 384)                        = 0
fcntl(0, F_SETLKW, {...})               = 0
alarm(0)                                = 10
rt_sigaction(SIGALRM, {...}, NULL, 8)   = 0
exit_group(1)                           = ?
+++ exited with 1 +++

Avi Kivity

<avi@scylladb.com>
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Feb 28, 2016, 3:54:02 AM2/28/16
to scylladb-users@googlegroups.com, chb2mn@gmail.com

On 02/27/2016 02:29 AM, chb...@gmail.com wrote:
Also, running it without systemctl has revealed that `Link Down` is printed after `Port`


Is that port connected?


$strace sudo scylla --network-stack native --dpdk-pmd

Use 'sudo strace -fF' instead of 'strace sudo' to get file names printed out correctly (and -fF for threads).

 scylla[31163]: 3: [/usr/bin/scy lla() [0x6bfb9d]] 
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chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 28, 2016, 3:14:00 PM2/28/16
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> Is that port connected?

Apparently not? It's strange though because I can bind that port to an IP and ssh into there and things work just fine. 

I changed NICs entirely and it worked and my throughput was 1000MBps which IIRC is suboptimal, right?

Avi Kivity

<avi@scylladb.com>
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Feb 29, 2016, 4:08:41 AM2/29/16
to scylladb-users@googlegroups.com, chb2mn@gmail.com


On 02/28/2016 10:14 PM, chb...@gmail.com wrote:
> Is that port connected?

Apparently not? It's strange though because I can bind that port to an IP and ssh into there and things work just fine. 


Maybe the cable or port was flakey so it took more time to negotiate than the dpdk timeout.


I changed NICs entirely and it worked and my throughput was 1000MBps which IIRC is suboptimal, right?

1000MBps = 10,000 Mbps, which is pretty good.

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chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 29, 2016, 11:30:36 AM2/29/16
to ScyllaDB users, chb2mn@gmail.com
> Maybe the cable or port was flakey so it took more time to negotiate than the dpdk timeout.

Perhaps, I'll investigate. Most likely, those NICs were put there on accident and never fully connected.

> 1000MBps = 10,000 Mbps, which is pretty good.

1,000 Mbps*, my mistake

Avi Kivity

<avi@scylladb.com>
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Feb 29, 2016, 11:33:40 AM2/29/16
to scylladb-users@googlegroups.com, chb2mn@gmail.com
On 02/29/2016 06:30 PM, chb...@gmail.com wrote:
> Maybe the cable or port was flakey so it took more time to negotiate than the dpdk timeout.

Perhaps, I'll investigate. Most likely, those NICs were put there on accident and never fully connected.

> 1000MBps = 10,000 Mbps, which is pretty good.

1,000 Mbps*, my mistake

I see.  How did you measure this?

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chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 29, 2016, 12:18:12 PM2/29/16
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It's the output when I switched NICs. It worked and started gossiping with other nodes.


Checking link status 
Created DPDK device
.................................done
Port 0 Link Up - speed 1000 Mbps - full-duplex
DHCP sending discover
DHCP timeout
Scylla version 0.18-20160216.b532919 starting ...
...

chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 29, 2016, 12:36:08 PM2/29/16
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I now get a series of ARP timeouts from the nodes in the cluster. Potentially due to the connection not being fast enough?

INFO  [shard 0] rpc - client $MY_CLIENT: client connection dropped: ARP timeout

chb2mn@gmail.com

<chb2mn@gmail.com>
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Feb 29, 2016, 3:37:17 PM2/29/16
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FYI $MY_CLIENT is the other seed in the cluster. So essentially, they can't talk to each other because (I believe) the timeout is too short and my connection is not fast enough.

When trying to use the Ethernet Controller 10-Gigabit X540-AT2, I get the Link Down error.
When using the I350 Gigabit Network Connection I get a a 1,000 Mb link which is too slow

Dor Laor

<dor@scylladb.com>
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Feb 29, 2016, 3:43:51 PM2/29/16
to ScyllaDB users, Christopher Burkhalter
On Mon, Feb 29, 2016 at 10:37 PM, <chb...@gmail.com> wrote:
FYI $MY_CLIENT is the other seed in the cluster. So essentially, they can't talk to each other because (I believe) the timeout is too short and my connection is not fast enough.

When trying to use the Ethernet Controller 10-Gigabit X540-AT2, I get the Link Down error.

It's probably a pure dpdk driver issue.
I'd check the most uptodate dpdk version and use their test app and report back to us.
We may need a rebase
 

chb2mn@gmail.com

<chb2mn@gmail.com>
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Mar 1, 2016, 9:29:50 AM3/1/16
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I did using DPDK v2.2.0 and I was able to run their example helloworld program using those interfaces.

chb2mn@gmail.com

<chb2mn@gmail.com>
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Mar 1, 2016, 11:39:15 AM3/1/16
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I've seen here that scylla uses dpdk version 1.8? Is this still true? will Scylla rebase before GA or should I downgrade dpdk?
...

Avi Kivity

<avi@scylladb.com>
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Mar 1, 2016, 11:44:00 AM3/1/16
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We're using 2.1.0 (+ local patches), and likely will only rebase after GA.
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