as the current kdump installation is searching for grub path, and ARM arch (marvell-armhf) are dependent on uboot, these changes has to be addressed. For now skipping kdump installation on ARM
Co-authored-by: lguohan <lguohan@gmail.com>
Implement classes IpmiSensor, IpmiFru to obtain platform sensors information for Platform2.0 APIs in DellEMC Z9264 platform.
Add a new file ipmihelper.py with the implementation for IpmiSensor, IpmiFru classes.
4628a5a [vs tests] Refactor fdb_update tests to be consistent with vs test suite (#1185)
9594de0 Enable MIRRORv6 for BFN platform (#1177)
a35afac [portsorch] use ingress/egress disable for LAG member enable/disable (#1166)
faab3e1 remove the obsoleted platforms build links (#1169)
97abec5 [restore_neighbors.py] build arp packet with correct hwsrc and psrc (#1158)
97a22ca [vs tests] Mark VLAN and warm reboot tests as xfail (#1183)
b453797 [Teamdmgrd]Fix "teamd cannot start when port channel was down before warm reboot" issue (#1171)
3732e74 [cfgmgr] clear loopback and vrf in kernel if not warmstart (#1141)
51315c1 [debugcounterorch] Add checks for supported counter types and drop reasons (#1173)
10f091d [vs tests] Disable NAT tests to unblock Jenkins (#1179)
698ca2a [portsorch] Refactor portsorch to use FlexCounterManager to setup port and queue stats (#1170)
ea8b1da Merge pull request #1125 from AkhileshSamineni/natorch_changes_in_sonic
bbd77fc Merge pull request #1126 from AkhileshSamineni/natsyncd_changes_in_sonic
419d9d2 Fix bug: shellquote the inner string (#1168)
d507a93 [aclorch] Validate that provided IN/OUT_PORTS are physical interfaces (#1156)
f24081b [AclOrch] add validation for check CRM (#1082)
85036df Merge pull request #1059 from AkhileshSamineni/nat_changes_in_sonic
1eac91e [portsorch] process PortsOrch tables in specific order (#1108)
80e01c0 Teamd :: fix for cleaning up the teamd processes correctly on teamd docker stop (#1159)
77fa5a4 Move away sairedis logrotate from signal handler (#1153)
5ad47af Merge branch 'master' into natorch_changes_in_sonic
982abd6 Fixed compilation issue after forced push.
286ca21 Fixed compilation issue.
3350b85 Added pytest testcases for NAT.
63ebb3a Added platform changes to avoid nexthop traching in OA.
f9a8302 Addressed review comments.
946e53d Fixed compilation issue.
3d2b900 Addressed review comments and added 'nat miss' traps in copp json.
ff2c78c Added changes to verify the NAT is supported before setting nat zone.
346f59a Addressed review comments.
8246acb Removed debug framework change to avoid compilation error
f59ec87 Fixed compilation issue.
e8b9dab Added aclorch changes for "do_not_nat" action.
88fe411 Orchagent changes in sonic-swss submodule to support NAT feature.
3ca530c Addressed review comments
e4b7724 Addressed Review comments
72750ac Natsyncd changes in sonic-swss submodule to support NAT feature.
2086ad2 Fixed compilation issue after forced push.
3fcfea3 Fix in cleanup.
4028803 Added missed check
ed405bf Addressed review comments
ae6eb80 Compilation fix to pick proper ACL Table name - CFG_ACL_TABLE_TABLE_NAME
d750132 Fix for string compilation issue
904e80b Corrected Makefile.am change.
5b09c41 Removed pytest related files and added those to PR #1125
fd733b8 Removed the Orchagent and Natsyncd related files as those are covered as part of PRs #1125 and #1126
b53c888 Loopback related changes for NAT.
29bb539 Added neighsync changes to support warm reboot for NAT.
4e0d0a1 Changes in sonic-swss submodule to support NAT feature.
Signed-off-by: Stepan Blyschak <stepanb@mellanox.com>
- [neighbor advertiser] remove http endpoint access (#792)
- [dropconfig] Move prefix-handling from CLI to orchagent (#785)
- [acl-loader] Use V6 ethertype for IPv6 ACL rule (#788)
- kdump support (#729)
- Add command line support for thermal control (#777)
- [fdbshow][nbrshow] Print interface OID in lieu of name if there is no OID->interface name mapping (#789)
- ipaddr module to ipaddress for show command (#786)
- [sonic_installer] Adding support for ARM Uboot firmware (#769)
- [config] Merge duplicate vrf configuration (#759)
- [dropconfig] Clean-up error output for devices that do not support drop counters (#784)
- [show] enhance 'show ip[v6] bgp summary' command (#754)
- On sflow enable, start the docker since it is disabled by default (#773)
- [portstat] fix header used (#743)
- Add VRF-related commands to Command Reference Document (#778)
- [intfstat] fix --delete fail when counters dump does not exist (#752)
- [scripts] Adds support for management (1.0) commands (#745)
- A generic JSON file updater, which can add/update-existing attributes. (#770)
- [command reference] Update show int counters info with l3 RIF (#725)
- [fast/warm reboot] ignore errors after shutting down critical service(s) (#761)
- Platform Driver Development Framework (PDDF): Adding PDDF CLI utils (#624)
- Platform plugin for Fast-reboot/warm-reboot (#740)
Signed-off-by: Danny Allen <daall@microsoft.com>
- move single instance services into their own folder
- generate Systemd templates for any multi-instance service files in slave.mk
- detect single or multi-instance platform in systemd-sonic-generator based on asic.conf platform specific file.
- update container hostname after creation instead of during creation (docker_image_ctl)
- run Docker containers in a network namespace if specified
- add a service to create a simulated multi-ASIC topology on the virtual switch platform
Signed-off-by: Lawrence Lee <t-lale@microsoft.com>
Signed-off-by: Suvarna Meenakshi <Suvarna.Meenaksh@microsoft.com>
* [plugins]add fan functions, add voltage, current, power for psu
* [plugins]link fanutil.py and psuutil.py to those in 2700
* [plugin]add thermal
* [plugin]add symbol links for thermalutil for all SKUs
- Sfp,Eeprom,Chassis(transceiver change event) support added for z9264f Platform 2.0 API
- Added Interrupt handler to SFP change event in dell_z9264f_fpga_ocores.c
- Fixed few indentation and offset issues in sfputil.py for z9264f
- Implemented fancontrol service to monitor S6000 fans and adjust fan speed w.r.t temperature.
- fancontrol.service starts the fancontrol script at startup.
- This script takes the average temperature by reading three sensors and configure FANS to appropritate RPM against the temperature.
- When the temperature is adjusted script will log in syslog for future reference.
- Also, script checks for faulty fans and report the status in syslog.
- catch all exceptions while trying https endpoint
- Used "config-setup backup" command to take a backup copy of current SONiC configuration.
- raise exception when http endpoint return failure
Since the syncd process running on different platforms will have the different full path names, we
change the full path name of process syncd in the monit config file such that it will be universal and is not for a specific vendor.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [MultiDB] (except ./src and ./dockers dirs): replace redis-cli with sonic-db-cli and use new DBConnector
* update comment for a potential bug
* update comment
* add TODO maker as review reqirement
update multiDB changes in sairedis, including:
[MultiDB]: repalce old APIs with New APIs incuding testing (#537)
[syncd] Move port map and port map parser to proper class (#542)
[syncd] Update syncd to expect correct object query message (#548)
Support for snat available entry switch attribute in vslib (needed to run vs pytests) (#546)
Move apiInitialized flag to Globals namespace (#545)
Move command line options and parser to separate classes (#541)
Move ntf_queue to proper NotificationQueue class (#539)
Move api mutex to global class and add sairedis namespace (#544)
Clean sairedis.h header (#543)
Fix mlnx.pl script for perl include local directory (#540)
Layer 2 Forwarding Enhancements (#510)
Signed-off-by: Dong Zhang d.zhang@alibaba-inc.com
* Update arista driver submodule
* Add support for 7260CX3-64E in boot0
* Refactor boot0 platform specific definition
Make it easier to manage new sku
* Add support for 7050CX3-32S in boot0
Just contains the required boot0 information
* Add basic plugin support for DCS-7050CX3-32S
* Add port config for Arista-7050CX3-32S-C32
Co-authored-by: yurypm <yurypm@arista.com>
Co-authored-by: byu343 <byu@arista.com>
00410e5 (HEAD, origin/master, origin/HEAD) [mgmt-framework] Update Swagger URL to repo1.maven.org (#37)
7562028 Merge pull request #36 from Azure/Arlo
cd22b4d (origin/Arlo) Added the certificate check to quiet
7fbcd46 Changed the swagger website to https
5d1041f Added sonic-mgmt-framework deb install to install the contents of sonic-mgmt-framework deb package (#30)
229fe69 Added sonic-mgmt-framework deb install to install the contents of sonic-mgmt-framework deb package
signed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
* [initramfs] Updated reuired tools for initramfs
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* [initramfs] Updated required tools for initramfs
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* [Platform] [Marvell] Platform specific debian package for et6448m device
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* Removed auto-generated files
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* [initramfs] Added mtd and uboot firmware tools package required for arm arch
Its been enabled to all arch including amd64
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* [initramfs] Added mtd and uboot firmware tools package required for arm arch
Its been enabled to all arch including amd64
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* [initramfs] Marvell arm modules update and platform config update
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* [iniramfs] add initramfs uboot-utils hook script only for ARM
Signed-off-by: Antony Rheneus <arheneus@marvell.com>
* Add a monit config file for teamd container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* Add a copy mechanism to put the monit config file in teamd container
into base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* Add a monit config file for snmp container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* Add a copy mechanism to put the monit config file of snmp container into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* Add a monit config file for dhcp_relay container in the dir
base_image_files.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* Add a copy mechanism to put the monit config file of dhcp_relay
container into base image under /etc/monit/conf.d.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* Add a monit config file for router advertiser container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* Add a copy mechanism to put the monit config file of router advertiser
contianer into base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-Pmon] Add a monit config file for pmon container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-Pmon] Add a copy mechanism to put the monit config file into the
base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-lldp] Add a monit config file for lldp container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-lldp] Add a copy mechanism to put the monit config file into the
base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-bgp] Add a monit config file for BGP container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-bgp] Add a copy mechanism to put monit config file into the base
image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-swss] Add a monit config file for the swss container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-swss] Add a copy mechanism to put monit config file into the
base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on barefoot
platform.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image on barefoot.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on broadcom.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image on broadcom.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on cavium.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-centec] Add a monit config file for syncd container on centen
platform.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on centen
platform.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on marvell.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit conifg file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on
marvell-arm64.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image on marvell-arm64.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on
marvell-armhf.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on mellanox.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a monit config file for syncd container on nephos.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Add a copy mechanism to put the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-sflow] Add a monit config file for sflow container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-sflow] Add a copy mechanism to put the monit conifg file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-telemetry] Add a monit config file for telemetry container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-telemetry] Add a copy mechanism to put the monit config file
into the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-database] Add a monit config file for database container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-database] Add a copy mechanism to put the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-Dhcprelay] Change a typo.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-Dhcprelay] Change the process name in monit config file to
dhcrelay.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] There is no desserve process in syncd container on
barefoot.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] There is no process desserve in syncd container on
cavium.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] There is no process named desserve in syncd on centec.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] There is no process named desserve in syncd on marvell.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Should not delete the process desserve in syncd container
on marvell.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Delete the process dsserve in syncd on marvell.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Delete the process dsserve in syncd container on
marvell-arm64.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Delete the process dsserve in syncd container on
marvell-armhf.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Delete the process dsserve in syncd container on
mellanox.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-Radv] Change the process name to radvd.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-telemetry] Correct a typo in monit_telemetry.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-teamd] Delete the monit config file for teamd.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-teamd] Delete the mechanism to copy the monit config file into
base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-dhcprelay] Delete the monit config file for dhcp_relay
container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-dhcprelay] Delete the mechanism to copy the monit config file
into the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-radv] Delete the monit config file foe radv container.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-radv] Delete the mechanism to copy the monit config file into
the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-bgp] change the monit config file for BGP container such that
monit only generates alert if the process is not running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-snmp] Change the monit config file for snmp container such that
monit only generates alret if the process is not running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-pmon] Change the monit config file for pmon container such that
monit only generates alert if the processes are not running for 5
minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-lldp] Change the monit config file for lldp container such that
monit only generates alerts if some processes are not running for 5
minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-pmon] Delete the monit config file for pmon container since some
of processes are not running depended on the type of box.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-pmon] Delete the copy mechanism to copy the monit config file
into the base image.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-lldp] Change the matching name for the process lldpd.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-swss] Change the monit config file for swss container such that
monit only generates alerts if the processes are not running for 5
minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container on
barefoot such that monit only generates alerts if the process is not
running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Correct a typo in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container on
broadcom such that monit only generates alerts if the processes are not
running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container on
cavium such that monit only generates alerts if the process is not
running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container such
that monit only generates alerts if the process is not running for 5
minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container on
marvell such that monit only generates alerts if the process is not
running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container on
marvell-arm64 such that monit only generates alerts if the process is
not running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container on
marvell-armhf such that monit will generate alert if the process is not
running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Change the monit config file for syncd container on
mellanox such that monit only generates alerts if the process is not
running for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-sycnd] Change the monit config file for syncd container such
that monit only generates alerts if the processes are not running for 5
minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-sflow] Change the monit config file for sflow container such
that monit only generates alerts if the process is not running for 5
minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-telemetry] Change the monit config file for telemetry container
such that monit only generates alerts if the processes are not running
for 5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-database] Change the monit config file for database container
such that monit only generates alerts if the process is not running for
5 minutes.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-database] Use 4 spaces to replace 2 spaces in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-bgp] Use 4 spcess to replace 2 spaces in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-lldp] Use 4 spaces to replace 2 spaces in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-swss] Use 4 spaces to replace 2 space in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-sflow] Use 4 spaces to replace 2 spaces in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-snmp] Use 4 spaces to replace 2 spaces in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-telemetry] Use 4 spaces to replace 2 spaces in monit config
file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Use 4 spaces to replace 2 spaces in the monit config file
on barefoot.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Use 4 spaces to replace 2 spaces in the monit config file
on broadcom.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Use 4 spaces to replace 2 spaces in the monit config file
on cavium.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Use 4 spaces to replace 2 spaces in the monit config file
on centec.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Use 4 spaces to replace 2 spaces in the monit config file
on marvell.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Use 4 spaces to replace 2 spaces in the monit config file
on mellanox.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-syncd] Use 4 spaces to repalce 2 spaces in the monit config file
on nephos.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
* [Docker-bgp] Remove the trailing extra spaces in monit config file.
Signed-off-by: Yong Zhao <yozhao@microsoft.com>
