similar to: diagnosing read performance problem

Hi, I am new to DTrace. Want to capture (for specific port #s) the loopback interface (lo0) tcp message flow with the complete message body. Is this possible with DTrace? Are any examples available? Thanks, Joe ____________________________________________________________________________________ Looking for a deal? Find great prices on flights and hotels with Yahoo! FareChase.

Hi everyone, I''ve been running a zfs fileserver for about a month now (on snv_91) and it''s all working really well. I''m scrubbing once a week and nothing has come up as a problem yet. I''m a little worried as I''ve just noticed these messages in /var/adm/message and I don''t know if they''re bad or just informational: Aug 2 14:46:06

Hi , I have posted DTrace script to snoop tcp traffic and also provided a wrapper script for it to filter out unwanted traffic. http://blogs.sun.com/roller/comments/raviswam/Weblog/tcp_snoop_using_dtrace Please let me know if you have any feedback/comments on this. Thanks Ravi

I''m not sure if this is a problem with the iscsitarget or zfs. I''d greatly appreciate it if it gets moved to the proper list. Well I''m just about out of ideas on what might be wrong.. Quick history: I installed OS 2008.05 when it was SNV_86 to try out ZFS with VMWare. Found out that multilun''s were being treated as multipaths so waited till SNV_94 came out to

Folks: I am unable to get my opensolaris sn-b85 domU to start up in an opensolaris sn-b85 dom0. I am booted to xvm. Other systems, such as Fedora 8, WinXP Pro, W2k3 server, W2k8 server and Windows Vista startup normally. I have used the following to build the domU: # mkfile -n 25g /solhvm/solhvm.img # ls -l /solhvm total 269 -rw------T 1 root root 26843545600 Jul 7 10:37 solhvm.img

Hi, I try to start Solaris10 HVM DomU on SNV_93 dom0 running amd athlon x2 and 8gb ram. When I try to create a domU i get: bash-3.2# virt-install -n sol10 --hvm -r 1024 --vnc -f /dev/zvol/dsk/rpool/sol10 -c /rpool/pub/sol-10-u5-ga-x86-dvd.iso Starting install... virDomainCreateLinux() failed POST operation failed: (xend.err ''Device 0 (vif) could not be connected. Backend device not

Hi Folks, I have a snv_105 sxce host that I just can''t get to work as expected with crossbow + zones. My test host persephone, is a virtual machine running under VMware ESXi 3.5, with 2 virtual network cards (e1000), all on the same flat network/subnet. It started life just 2 days ago with a clean install of snv_95, and I LUed to 105 yesterday. To rule out any sharing issue, the first

I''ve recently upgraded my x4500 to Nevada build 97, and am having problems with the iscsi target. Background: this box is used to serve NFS underlying a VMware ESX environment (zfs filesystem-type datasets) and presents iSCSI targets (zfs zvol datasets) for a Windows host and to act as zoneroots for Solaris 10 hosts. For optimal random-read performance, I''ve configured a single

I''m seeing some pretty pitiful performance using ZFS on a NFS server, with a ZFS volume exported (only with rw=host.foo.com,root=host.foo.com opts) and mounted on a Linux host running kernel 2.4.31. This linux kernel I''m working with is limited in that I can only do NFSv2 mounts... irregardless of that aspect, I''m sure something''s amiss. I mounted the zfs-based

I''m working on a case where customer has a 3rd party streams driver/module, called uplink, which sits over Sun''s ce driver. This 3rd party module is used by the telco to perform telco grade NIC failover. The customer was given an IDR ce driver, to avoid a panic they were given. The IDR driver was successful in avoiding the panic, but now the customer is getting many

Remote box SNV93 (xVM kernel) 192.168.1.54 (NIC RTL8169) Attempts of ssh connection from CentOS 5.1 DomU 192.168.1.37 at SNV93 Dom0 (NIC RTL8110SC) # ssh user1@192.168.1.54 hangs .. TCPDUMP running on remote box (192.168.1.54) # tcdump -s 1600 -vv One entry generates for each ssh connection attempt. First:- 17:12:43.058821 IP (tos 0x0, ttl 64, id 19771, offset 0, flags [DF], proto TCP (6),

Hi, I''m running FreeBSD 7.1-PRERELEASE with a 500-gig ZFS drive. Recently I''ve encountered a FreeBSD problem (PR kern/128083) and decided about updating the motherboard BIOS. It looked like the update went right but after that I was shocked to see my ZFS destroyed! Rolling the BIOS back did not help. Now it looks like that: # zpool status pool: tank state: UNAVAIL status:

Basically what I am trying to attempt here is to have multiple vm''s in a private network that is seperate from any of the physical networking devices. So far all I have really been able to do is connect the vm''s to an etherstub, but cannot get them to communicate with eachother. I have been using this (http://blogs.sun.com/droux/entry/private_virtual_networks_for_solaris) as a

Dear dtrace Experts, I have seen some dtrace utilities like opensnoop and execsnoop etc. My interest is to write a simple script that can snoop the files which uses the 3 syscalls like open,create,unlink. I have gone through dtrace oneliners that can do the same : dtrace -n ''syscall::open*:entry { printf("%s %s",execname,copyinstr(arg0));}'' dtrace -n

So, just to play with vnics with 106, I have... e1000g2 plumb''d with 192.168.85.10 vnic0 is created on top of e1000g2 with 192.168.85.22 I snoop on e1000g2 to see the traffic. I ping 192.168.85.22 and it works. I stop the snoop on e1000g2. I ping 192.168.85.22 and it doesn''t work. I start the snoop on e1000g2. I ping 192.168.85.22 and ping works. Is this a new feature with

Hi, I''m afraid I have some problems understanding how crossbow is supposed to work ;) On my machine (OpenSolaris, snv_111) I''m running VirtualBox with couple of linux / XP installation and additionally a zone with exclusive IP. My network configuration looks like this: [6]elsinore:~>dladm show-link LINK CLASS MTU STATE OVER bge0 phys 1500 up

Hi, Running OpenSSH 3.5p1 or 3.7.1p2 on two SGI orgin 300 systems of IRIX 6.5.17 with 4 600MHz CPU and gigabits network. Transfer a 1GB file with ftp took 28 seconds. Transfer a 1GB file with scp took 148 seconds. Use "snoop" to capture all network packets between these two systems. Ftp tansmitted about 107840 packets, but scp transmitted about 763339 packets. Is this normal? Why?

In current Crossbow''s implementation, vlan tag seems to be unconditionally retained for promisc mode listener even when MAC_OPEN_FLAGS_TAG_DISABLE is not specified. I saw comments in mac_rx_deliver() saying that this is deliberately designed like this. I''m wondering why we design it like this (choose not to respect MAC_OPEN_FLAGS_TAG_DISABLE flag for promisc mode listener)? Or

Hi, I''m running Nevada 75a configured as dom0. I added a domU HVM running Nevada 75a, on a Sun X4600 with 8 ADM Dual cores. I can get the domU installed and configured, however, I can not get any network connectivity. I followed the steps accoding to documents on Open Solaris. I also followed some of the threads of the list to verify the configuration, but I can not fix the

I''m running a nevada b99 guest on a nevada b99 host. The guest is configured as a dhcp client. When I snoop in dom0 while the guest boots, I see two back-to-back DHCPREQUEST packets issued by the guest. The first of the two packets has an empty UDP checksum; otherwise they seem identical. Is this a bug? Fred Oliver ETHER: ----- Ether Header ----- ETHER: ETHER: Packet 246 arrived