Mark5 OS & Mark5C Software Development · State of Mark5’s OS • Debian Lenny (under test) –...

Mark5 OS &Mark5C Software Development

Chester “Chet” [email protected]

Objective

• State of Mark5’s OS• Mark5A/B Application Software

– SDK9– Version Info

• Maintenance• Mark5C Software / Status

6th IVS TOW April 2011 2

State of Mark5’s OS• Debian Lenny (under test)

– Latest OS distribution supported– Linux kernel 2.6.26– Requires Conduant SDK9

• Debian Etch– Latest OS distribution no longer supported– Last patch available on Jan 2011


State of Mark5’s OS• Why have sites upgraded their OS’s

– Security concerns / maintainability• Mark5 is connected to a network

– Performance improvements• Linux kernel network stack improvements

– Network interface cards (NICs) support» 1 Gbps / 10 Gbps NIC

• Other subsystems– Disk– Raid, etc

– New motherboard support• Old distributions do not support chipsets

– Bug fixes / capabilities Streamstor controller card• Large Module SATA support


Mark5 Application Software

• Mark5A– Converted to work with SDK9.1– Testing on Mark5A / 5B / 5B+– Critical bug

• We are trying to resolve with Conduant• Capacity of disks returns incorrect value• VSN, record, disk_size, etc.


Mark5 Application Software• What it is:

– Two debian packages• Mark5A/5B application

– mark5a_2.0.X-i386.deb– mark5b_2.0.X-i386.deb– Same code, the post install script creates proper

command to start application• streamstor_9.1.0-i386.deb

– Installed / maintained through a standard package manager

• synaptic (apt-get) / aptitude • dpkg


Upgrade Approach• Debian mirror at Haystack

– edit /etc/apt/source.list and add: deb http://evlbi.haystack.mit.edu/debian/ binary/

– run apt-get update

• For Mark5A systems• apt-get install mark5a

– Updates mark5a / streamstor

• apt-get install streamstor– Updates streamstor only


Upgrade Approach (cont)• For Mark5B systems

• apt-get install mark5b– Updates mark5b / streamstor / mk5bio

• apt-get install streamstor– Updates streamstor only


What’s Next• Presently 2 stable Debian OS distro’s

– Lenny / Squeeze• Support for Lenny

– thru February 2012– Debian supports second distribution for 1 year

• After release of new distribution

• Linux kernel 2.6.26 (Lenny) 2.6.32 (Squeeze)– Not Mark5 Application dependent– Conduant / Jungo driver dependent– SDK9.X in house under test

• 64 bit kernel support – Jungo / SDK dependent – Under verification at Conduant.


SDK InformationSDK

VersionShared Library

version numbercc5A/cc5B

linked libraryDebian Package version

9.1 libwdapi1021 -lwdapi1021 streamstor_9.1.0-i386 (u.t)

9.0 libwdapi1011 -lwdapi1011 streamstor_9.0.0-i386 (5c)

8.3beta libwdapi1001 -lwdapi1001 streamstor_1.2.2-i386 (u.t.) (1)

8.3 libwdapi1001 -lwdapi1001 streamstor_1.2.1-i386.deb

8.2 libwdapi921 -lwdapi921 streamstor_1.1.4-i386.deb

8.1 libwdapi910 -lwdapi910 NA

7.6 libwdapi801 -lwdapi801 NA

6.X libwdapi521 -lwdapi623 NA


u.t. -> Under Test (5A/5B/5C)1 -> Contains a firmware fix potential e-transfer problem (disk2net)5c -> for Mark5C only

Maintenance

• Recommend signing up for – debian-security-announce mailing list

• http://lists.debian.org/debian-security-announce/

– Informs the users about security problems by posting security advisories about “all” Debian packages on this list.

• Alternative– Update the package list weekly– Upgrade the required packages if any


Mark5C

Software• DRS Version 0.9.2 official released

– 2Gbps in 1 bank mode – Mark5B data support (User directory)– Support specific for hardware correlation

• DRS Version 1.0 (under development/test)– 4Gbps in 2 bank mode – VDIF Support (user directory)– Support specific for software correlation– Expected release

• Beta version in June• Software Utilities in July

6th IVS TOW May 2011 13

Mark5C Software Utilities• SDK 9.1 officially released

– Correct firmware for 10G DB– Haystack had a special version with appropriate firmware files– Official SDK9.0 from Conduant would not work with 5C

– Verifying operations with DRS 0.92 and pre 1.0

• FuseMk5 modifications– 2 bank mode support under development

• SSErase– 2 bank mode support under development

• Difx support– Direct reading of disk modules in 2 bank mode??– With FuseMk5 initial path


Mark5C Features• Uses the same chassis and disk modules as

Mark 5C/5A• Data rate capability to 2048 Mbps

– to a single ‘8-pack’ disk module

• Data rate capability to 4096 Mbps – to two ‘8-pack’ disk modules

• Uses inexpensive consumer-grade SATA disks• Designed to meet Mark5C specification• 10G CX-4 Ethernet support


Mark5C Features (cont)

• There is no 1pps– Timing or synchronization

• Recording starts immediately after command is issued– What ever is on the 10G wire potentially is

recorded– The data source (RDBE/DBBC/etc) is responsible

for gating• the data on the wire• timing synchronization


PSN Mode 0• Records all packets received • No reordering of packets• Missing packets are not detected• Presently supported by 10G firmware• Used when RDBE / DBBC is connected directly

to the Mark5C• To configuration of the PSN Mode must use

the “packet” command


PSN Mode 1• Using a 32 bit packet serial number

– Guarantees order of packets written to disk– Missing packets replaced by fill pattern

• Used when transmitting data through network switch

• Awaiting firmware from Conduant to support this feature


PSN Mode 2

• Same as PSN Mode 1 with the addition of– If the most significant bit of the PSN is set, the

packet is discarded• A method to discard invalid marked packet• Used when transferring data through a network switch

• Awaiting firmware from Conduant to support this


Mark5C User Directory• Is not backward compatible with 5A/5B• Has support for

– 5B data (0.92)– VDIF Data (1.0)

• If there is a need for bank mode with VDIF support– an early version can be released

• New data structure– Describing the meta data of the scans recorded

• Impact is to hardware correlators


Field System Support

• When will the mark5C be integrated into the field system?– I will be working with Ed Himwich on this

• Mark5C commands• RDBE commands

– Release for standard operations– After extensive testing


Questions ?

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