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Click below to get to a section quickly INDEX
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Connecting to the Messenger clouds:
2. Run SecureCRT on any machine setup to connect to the public Internet. This can be a corpnet machine that has Remote Winsock proxy installed. (Contact wlai for a license, but a 30-day trial copy is available for download from http://www.vandyke.com/download/SecureCRT/index.html ) 3. Click New on the Session List tab to create a new session. Enter the following information: · Name = whatever friendly name you like · Protocol = SSH · Hostname or IP = law-l2.hotmail.com · Port = 22 · Username = <leave blank> · Cipher = 3DES · Authentication = Password · Password = <leave blank> · <Click OK> 4. Back on the Session List tab, select this newly created session, and click OK 5. If this is your first time connecting to the law-l2.hotmail.com, then you will be prompted to save the identification and key for this sever. Click Accept & Save. 6. You will be prompted to enter your UserID. Enter the UserID that Lorrie Wood gave you. 7. You will be prompted the password. First type in the four-digit personal prefix followed by the 6 digits currently showing on your SecureID key fob. 8. You are now logged into the law-l2 machine, which is located on the Hotmail facility. From here you can telnet to any of the Messenger machines. 9. If you want to telnet to the Messenger machines, at the “>” prompt type in “telnet msgr-ns1”, where msgr-ns1 is the machine that you would like to access. 10. You will be prompted for the UserID and password for these machines. Here you need to use the UserID and password for these machines. Note that the password is not the SecureID passwords. What are the machines?
What are the key directories on the NS/DP/SB?
How do I transfer files to and from the Messenger machines?You have to do it in a few steps: 1. From you PC, you can only zmodem files to the law-l2 machine.
About the staging server msgr-s1The staging sever is where builds and configuration files are prop from. It contains the build tarballs, as well as the latest configuration files. There are these directories in the msgr-s1 staging server:
Architecture OverviewDP – Dispatch ServerWhen users initially contact a Messenger server cloud, a Dispatch Server (DP) handles the packet that they send. A server cloud may have a single Dispatch Server or it may have several of them. (When there is more than one Dispatch Server, incoming packets are evenly distributed among them by a Cisco Local Director using a round robin strategy.) The DP server selects (via a hash function that defines the partitioning strategy for Notification Servers,) the Notification Server (NS) that the user should be using, and tells the user to connect to that NS. The software that’s installed on a Dispatch Server is actually identical to the software installed on a Notification Server (NS) as described below – the difference is in how the machine is used. (In other words, any NS is capable of being used as a DP. If you were to hook an NS machine up to the Cisco Local Director, or modify client software to initiate a connection to an NS machine’s IP address, then that machine would automatically start functioning as a DP.) NS – Notification ServerUsers maintain a persistent connection to a Notification Server (NS) for the duration of their session. When there is more than one NS, users are partitioned across them, such that each user will always be sent to a particular NS. (The partitioning scheme can be changed, to handle emergencies such as hardware failures, but usually the partitioning scheme remains static.) When the user first connects to an NS, the NS performs authentication (by talking to an Authentication M-Serve,) and then handles all messaging between the client and the server cloud except for IM sessions. When users request an IM session, that session is established by the NS on a Switchboard Server (SB), and the client is provided with connection information for connecting to the IM session. NS Servers are listed in a configuration file (Server.conf) and that file is used as part of the user-partitioning algorithm. If you were to add a DP machine to the file it would automatically start functioning as an NS because the bits installed on a DP are identical to those installed on an NS. SB – Switchboard ServerIM sessions take place on the Switchboard Server (SB). Switchboard Servers announce their availability by multi-casting a message that is received by the NS machines. When a user is participating in more than one IM session, they will be connected to more than one Switchboard Server session. Friends U – Friends U-StoreThe Friends U-Store is the storage system for MSN Messenger Service. This is where Messenger specific information is stored including the user’s friendly name, and the user’s lists (forward, reverse, allow, and block). When we have more accounts than can be handled on a single U-Store, we spread the accounts across multiple U-Stores. All U-Store servers provide access to their storage via XFS. Friends M – Friends M-ServeThe M-Serve acts as an index to the U-Stores for all accounts. The Friends M-Serve acts as an index to the Friends U-store. When there is more than one Friends M-Serve, each Friends M-Serve is a full replica of the others. It is possible to lookup a Messenger entry for any person located in any of the Friends U-Stores by searching in any of the Friends M-Serves. In other words, while the Friends U-Stores are partitioned to each hold a portion of the Messenger accounts, each Friends M-Serve contains a full index for all of the Friends U-Stores. Hotmail Servers used by MessengerAuth U – Authentication U-StoreThe Authentication U-Store is the storage system for Hotmail. This storage contains all of the information concerning a Hotmail account including the password. MSN Messenger Service looks up this password in order to perform user authentication. All U-Store servers provide access to their storage via XFS. Auth M – Authentication M-ServeThe M-Serve acts as an index to the U-Stores for all accounts. The Auth M-Serve acts as an index to the Hotmail storage system. When there is more than one Auth M-Serve, each Auth M-Serve is a full replica of the others. It is possible to lookup a Hotmail entry for any person located in any of the Authentication U-Stores by searching in any of the Authentication M-Serves. In other words, while the Auth U-Stores are partitioned to each hold a portion of the Hotmail accounts, each Auth M-Serve contains a full index for all of the Auth U-Stores. PostmanThe Postman delivers incoming mail to the Auth U-Store. When the postman places a message in the user’s inbox, it also sends a notification to the user’s Notification Server (NS) informing the NS that the user has received mail. In turn, the NS sends a message to the client and the user sees a popup notification. Membership DirectoryThe Membership Directory is used to find users by name. When a user tries to add someone by name, the Add Wizard looks for that name in the Membership Directory. The results of that search (there can be multiple hits) are returned to the user so that the user may choose the person (by name and location) to whom they want to send Friends & Family (F&F) mail. We do not disclose account information or e-mail addresses from this directory because it would be a violation of the privacy of people who are in the directory. The Messenger server cloud is located in the Hotmail facilities in San Jose. This server cloud contains the following machines: Five (5) Sun Ultra 5 machines (located behind a Cisco Local Director) serve as the production cloud’s Dispatch Servers. The Local Director receives messages for the Internet address “messenger.hotmail.com” and evenly distributes them among the five dispatch servers. These machines are named MSGR-DP-1 thru MSGR-DP-5. Eighteen (18) Sun AXMP machines are used as the production cloud’s Notification Servers. All Messenger accounts are partitioned across 20 Notification servers, named MSGR-NS-1 thru MSGR-NS-18. The five Dispatch Servers figure out (via a hash function) which of the eighteen Notification Servers each user should be using, and tells the user to connect to that NS. Five (5) Sun AXMP machines are used as the production cloud’s Switchboard Servers. These machines are named MSGR-SB-1 thru MSGR-SB-5. Two (2) Sun AXMP machines (located behind a Cisco Local Director) serve as the production cloud’s Friends M-Serve machines. Whenever one of the NS machines wants to communicate with a Friends M-Serve it will contact the address of the Friends M-Serve Local Director. The Local Director will evenly distribute the requests among the two Friends M-Server machines. These machines are MSGR-M-1 and MSGR-M-2. Five (5) Sun E4500 machines are used as the Friends U-Store. Each of these machines will store data for 20% of the Messenger accounts. These machines have large RAID disk arrays and Qualstar tape drives for backup. The production cloud does not have any Auth M-Serve or Auth U-Store machines that are separate from the Hotmail’s computers. The Messenger production server cloud will communicate directly with the Auth M-Serve and Auth U-Store machines that are maintained by Hotmail. Since Hotmail maintains those machines, they are not described here. After the MSN Messenger test team signs off on a build as being high-enough quality to deploy, our operations staff runs the scripts necessary to move the build from MMSDNS onto the production machines. This requires several steps, because we’re moving code from outside the Hotmail facility onto machines that are located behind the Hotmail firewall. DP and NS
3. Create directory a. /home/hotmail b. /home/hotmail/messenger c. /home/hotmail/messenger/temp d. /home/logs 4. With root privileges, add into /etc/system the line set
tcp:tcp_conn_hash_size=32768 set
tcp:tcp_close_wait_interval=60000 set
tcp:tcp_keepalive_interval=600000
SBSwitchboard machine is almost identical to Dispatch/Notification machines:
3. Create directory /home/hotmail, /home/hotmail/messenger 4. With root privileges, add into /etc/system the line set
tcp:tcp_conn_hash_size=32768 set
tcp:tcp_close_wait_interval=60000 set
tcp:tcp_keepalive_interval=600000
Friends M-servFollow standard Hotmail M-serv installation instructions Friends U-storeFollow standard Hotmail U-store installation instructions Q: Does the standard U-store installation include Veritas? Q: what is the standard inode size used? Network
Setup[WYL1]
The following are ports that need to be enabled:
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