On Thu, Jun 21, 2012 at 3:51 PM, Stan Hoeppner <s...@hardwarefreak.com> wrote: > On 6/21/2012 3:05 AM, Muhammad Yousuf Khan wrote: >> i am using Debian with below specs >> 1 GB RAM >> Xeon 2.8 >> 2 TB SATA x2 (RAID 1) >> >> i learn that my LAN throughput is like 200 to 300 Mbps which is quite >> enough for me for now. but i am planning ahead to use ISCSI for >> virtualization to provide HA, therefore i need my Giga LAN to reach >> the 1000 Mbps throughput. >> >> so i need to know. what could be done to achieve this ? > > That Xeon 2.8 is apparently a 130nm NetBurst CPU, likely 8 years old, > which makes the mobo and system chipset 8 years old. This is a limiting > factor, but probably not _the_ limiting factor, in GbE throughput. > > More important is what ethernet ASIC you're using. Realtek and Marvell > ASICs will never hit close to wire speed. That's just a fact. Intel > ASICs can easily. Probably Broadcomm as well. > > Also, to achieve wire speed you'll likely need a large MTU, often called > a "jumbo frame". All devices on a subnet must have the same size MTU, > so this is only an option if you can match the MTU across them all. And > all switches on the subnet must also support jumbo frames. Last, the > router for the subnet must support jumbo frames on the interface > connected to the jumbo segment. If not you'll not be able to reach the > public internet.
Yes i am aware of the jumbo frame and played a bit with it in openfiler thanks for reminding me that btw are you getting 600Mbps with Jumbo frame? > > Regarding Samba, you'll never reach wire speed with it, ~80-85% seems to > be the limit. FTP should get really close, 90-95%. iperf and other > test utilities should reach 95+% with good NICs. > > Before we can give you additional advice/pointers, we need to know what > ethernet ASIC (NIC) is in the workstation, and also in the Windows > machine you're communicating with. If either is a Realtek or other low > end ASIC you won't reach more than 600-700Mb/s or so. iSCSI performance > should be within a few percent of the iperf rate with good NICs. > > -- > Stan > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: http://lists.debian.org/4fe2fcb1.7040...@hardwarefreak.com > -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/cagwvfmkyqevfzop8d0bofwdqkuqqd6nuzoryof-sp64rwye...@mail.gmail.com
