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  • Mongrel Cluster on Ubuntu Server Karmic

    - by trobrock
    I am trying to get mongrel cluster working on my Ubuntu Server Karmic box in preparation to setup Capistrano. I've been trying to get the two to work all day and finally decided to completely remove Capistrano and see if I can just get Mongrel Cluster to work. I ran this to install mongrel cluster: gem install mongrel mongrel_cluster Everything installed fine, when I change into my app's directory... # mongrel_rails -bash: mongrel_rails: command not found I can run it from its install location: # /var/lib/gems/1.8/bin/mongrel_rails Usage: mongrel_rails <command> [options] Available commands are: ... It lets me build the cluster configuration file fine, but when I run the clister:start command: # /var/lib/gems/1.8/bin/mongrel_rails cluster::start starting port 8000 /usr/lib/ruby/1.8/rubygems/custom_require.rb:31: command not found: mongrel_rails start -d -e production -p 8000 -P tmp/pids/mongrel.8000.pid -l log/mongrel.8000.log starting port 8001 /usr/lib/ruby/1.8/rubygems/custom_require.rb:31: command not found: mongrel_rails start -d -e production -p 8001 -P tmp/pids/mongrel.8001.pid -l log/mongrel.8001.log starting port 8002 /usr/lib/ruby/1.8/rubygems/custom_require.rb:31: command not found: mongrel_rails start -d -e production -p 8002 -P tmp/pids/mongrel.8002.pid -l log/mongrel.8002.log It seems it isnt calling it from the right directory after that command, what can I do to fix this? I tried setting the path previously when trying to set up Capistrano, but the path didnt stay set when Capistrano used ssh to run the commands.

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  • Nexenta storage metro cluster - what are components involved?

    - by Jiri Xichtkniha
    I'm quite imporesses that Nexenta can build storage metro cluster (site to site storage mirroring). As Nexenta is built on Illumos (successor of OpenSolaris) I was thinking what kind of components are involved in their storage metro cluster. Could anybody enlight me what components are doing this site-site mirroring and if these components are open source so one can build similar storage metro cluster on his own? ZFS is local filesystem so what takes care of clustering?

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  • Failover Cluster Quorum Failing

    - by oruchreis
    Hi, I have two nodes which boots from iscsi to implement windows 2008 cluster. And I'm using disk majority option as quorum over iscsi. But when the quorum's iscsi connection failed(May be san server reset), the failover cluster is failed too. If I reset one of the nodes, it can open, but its system disk goes offline. I cant change its status as online, because it says that its reserved by failover cluster(disk is on iscsi, beacuse iscsi boot). And this disk works as readonly. Anything on it cant be deleted or written. So, I cant rejoin the node to the cluster again. I have to reinstall windows. So, what I'm asking is, how can I implement more quorum backup? I mean, can I use both disk majority and file share majority at same time? AFAIK, every nodes also keep the quorum's copy too. But I don't know sometimes san servers goes offline. And quorum's iscsi connection and nodes' iscsi connections get lost. So, nor the quorum that is kept in the nodes neither the quorum iscsi disk is not enough to start the cluster again. I want to use both disk majority and file share majority at the same time. Can I do this? Have you any other suggestion? Regards.

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  • MySQL Cluster Failover doesn't work

    - by Lukasz
    I have two servers, where First server 10.100.15.150: 1. one mgm server 2. one ndbd 3. one mysql api Second server 10.100.15.160: 1. one ndbd 2. one mysql api When i start all 'parts' of cluster it looks : Cluster Configuration [ndbd(NDB)] 2 node(s) id=21 @10.100.15.150 (mysql-5.1.56 ndb-7.1.17, Nodegroup: 0) id=22 @10.100.15.160 (mysql-5.1.56 ndb-7.1.17, Nodegroup: 0, Master) [ndb_mgmd(MGM)] 1 node(s) id=3 @10.100.15.150 (mysql-5.1.56 ndb-7.1.17) [mysqld(API)] 2 node(s) id=11 @10.100.15.150 (mysql-5.1.56 ndb-7.1.17) id=12 @10.100.15.160 (mysql-5.1.56 ndb-7.1.17) When i shutdown first machine - 10.100.15.150, on second the nbdb process also has been shutdown so i cannot use this data node and cluster fail ... How i must configure this cluster to get FailOver working ? Thx

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  • Difference between all servers in one cluster and more than one cluster with servers?

    - by silla
    Not sure I understand what´s the difference or how it works when servers a running in one cluster or if there are more than one clusters with servers in it - regard High availability & Load Balancing. For me they are somehow the same, there is not really a big difference. Let´s make a simple example: 2 Servers in 1 Cluster 2 Clusters with each 1 Server - 1. If one Server failure, the other one is able to continue the work. The same for Load Balancing, these two Servers are able to balance the work together. - 2. The same thing! If one Server failure... The only thing that could be a problem with point 1. is if the Cluster fails (then both of the Server are dead). But is this even possible? I was reading stuff about clustering and high availability but I think I do not get this really. Probably I did not really understand how a cluster is working. Are these 2 points with 1 Cluster and 2 Clusters somehow the same or are there really some big differences? What should I know about it? Thank you

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  • Setup mod-rewrite

    - by Publiccert
    I'm trying to setup mod-rewrite for a few servers. The code lives in /home/jeff/www/upload/application/ However, this is what's happening. It appears to be a problem with mod-rewrite since it's appending code.py to the beginning of the directory: The requested URL /code.py/home/jeff/www/upload/application/ was not found on this server. Here are the rules. Which one is the culprit? WSGIScriptAlias / /home/jeff/www/upload/application Alias /static /home/jeff/www/upload/public_html <Directory /home/jeff/www/upload/application> SetHandler wsgi-script Options ExecCGI FollowSymLinks </Directory> AddType text/html .py <Location /> RewriteEngine on RewriteBase / RewriteCond %{REQUEST_URI} !^/static RewriteCond %{REQUEST_URI} !^(/.*)+code.py/ RewriteRule ^(.*)$ code.py/$1 [PT] </Location> </VirtualHost>

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  • SQL Server 2008 cluster freezing

    - by Ed Leighton-Dick
    We have run into a strange situation in which a SQL Server 2008 single-node cluster hangs. As background, we are rebuilding a Windows Server 2003/SQL Server 2005 two-node cluster using Windows 2008 and SQL Server 2008. Here's the timeline: Evicted the passive node (server B) from the Windows 2003/SQL 2005 cluster. The active node now functions as a single-node cluster with no problems. Wiped server B's disks and installed Windows 2008 and SQL Server 2008 as a single-node cluster. Since we do not want to the two clusters to communicate yet, we left the cluster's private network "heartbeat" adapter unconfigured. The cluster comes up and functions normally. Moved all databases to the new cluster. Cluster continues to function normally. Turned off server A (old cluster) in preparation for rebuilding as the second node of the new cluster. SQL Server instance on server B (new cluster) locks up, even though it should have no knowledge of or interaction with server A. Restarted server A. SQL Server instance on server B (new cluster) immediately begins working again. Things we have tried: The new cluster's name responds to ping and NETBIOS requests, even while the SQL Server is hung. We have confirmed that no IP address is assigned to the old heartbeat adapter, and it is not pulling an IP address from DHCP. Disabling the heartbeat's network card has the same effect. No errors were generated in any logs - Windows or SQL. When the error first occurred, it sat in the hung state for quite some time (well over 10 minutes) before anyone figured out what was going on. This would seem to eliminate any sort of normal cluster timeout in which it would have been searching for the other node (even if one had been configured). Server B is running Windows 2008 SP2, fully patched, and SQL Server 2008 SP1 CU7 (10.0.2775).

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  • Is This Your Idea of Disaster Recovery?

    - by rickramsey
    Don't just make do with less. Protect what you've got. By, for instance, deploying Oracle Solaris 10 inside a zone cluster. "Wait," you say, "what is a zone cluster?" It is a zone deployed across different physical servers. "Who would do that!" you ask in a mild panic. Why, an upstanding sysadmin citizen interested in protecting his or her employer's investment with appropriate high availability and disaster recovery. If one server gets wiped out by Hurricane Sandy along with pretty much the entire East Coast of the USA, your zone continues to run on the other server(s). Provided you set them up in Edinburgh. This white paper (pdf) explains what a zone cluster is and how to use it. If a white paper reminds you of having to read War and Peace in school, just use this Oracle RAC and Solaris Cluster Cheat Sheet, instead. "But wait!" you exclaim. "I didn't realize Solaris 10 offered zone clusters!" I didn't, either! And in an earlier version of this blog post I said that zone clusters were only available with Oracle Solaris 11. But Karoly Vegh pointed me to the documentation for Oracle Solaris Cluster 3.3, which explains how to manage zone clusters in Oracle Solaris 10. Bite my fist! So, the point I was trying to make is not just that you can run Oracle Solaris 10 zone clusters, but that you can run them in an Oracle Solaris 11 environment. Now let's return to our conversation and pick up where we left off ... "Oh no! Whatever shall I do?" Fear not. Remember how Oracle Solaris 11 lets you create a Solaris 10 branded zone inside a system running Oracle Solaris 11? Well, the Solaris Cluster engineers thought that was a bang-up idea, and decided to extend Oracle Solaris Cluster so that you could run your Solaris 10 applications inside the protective cocoon of an Oracle Solaris 11 zone cluster. Take advantage of the installation improvements and network virtualization capabilities of Oracle Solaris 11 while still running your application on Oracle Solaris 10. You Luddite, you. That capability is in the latest release of Oracle Solaris Cluster, version 4.1, which became available last Friday. "Last Friday! Is it too late to get a copy?" You can still get a free copy from our download center (see below). And, if you'd like to know what other goodies the 4.1 release of Oracle Solaris Cluster provides, see: What's New In Oracle Solaris Cluster 4.1 (pdf) Free download Oracle Solaris Cluster 4.1 (SPARC or x86) Tech Article: How to Upgrade to Oracle Solaris Cluster 4.0, by Tim Read. As always, you can get the latest information about Oracle Solaris Cluster, plus technical how-to articles, documentation, and more from Oracle Solaris Cluster Resource Page for Sysadmins and Developers. And don't forget about the online launch of Oracle Solaris 11.1 and Oracle Solaris Cluster 4.1, scheduled for Nov 7. "I feel so much better, now!" Think nothing of it. That's what we're here for. - Rick Website Newsletter Facebook Twitter

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  • Building a SOA/BPM/BAM Cluster Part I &ndash; Preparing the Environment

    - by antony.reynolds
    An increasing number of customers are using SOA Suite in a cluster configuration, I might hazard to say that the majority of production deployments are now using SOA clusters.  So I thought it may be useful to detail the steps in building an 11g cluster and explain a little about why things are done the way they are. In this series of posts I will explain how to build a SOA/BPM cluster using the Enterprise Deployment Guide. This post will explain the setting required to prepare the cluster for installation and configuration. Software Required The following software is required for an 11.1.1.3 SOA/BPM install. Software Version Notes Oracle Database Certified databases are listed here SOA & BPM Suites require a working database installation. Repository Creation Utility (RCU) 11.1.1.3 If upgrading an 11.1.1.2 repository then a separate script is available. Web Tier Utilities 11.1.1.3 Provides Web Server, 11.1.1.3 is an upgrade to 11.1.1.2, so 11.1.1.2 must be installed first. Web Tier Utilities 11.1.1.3 Web Server, 11.1.1.3 Patch.  You can use the 11.1.1.2 version without problems. Oracle WebLogic Server 11gR1 10.3.3 This is the host platform for 11.1.1.3 SOA/BPM Suites. SOA Suite 11.1.1.2 SOA Suite 11.1.1.3 is an upgrade to 11.1.1.2, so 11.1.1.2 must be installed first. SOA Suite 11.1.1.3 SOA Suite 11.1.1.3 patch, requires 11.1.12 to have been installed. My installation was performed on Oracle Enterprise Linux 5.4 64-bit. Database I will not cover setting up the database in this series other than to identify the database requirements.  If setting up a SOA cluster then ideally we would also be using a RAC database.  I assume that this is running on separate machines to the SOA cluster.  Section 2.1, “Database”, of the EDG covers the database configuration in detail. Settings The database should have processes set to at least 400 if running SOA/BPM and BAM. alter system set processes=400 scope=spfile Run RCU The Repository Creation Utility creates the necessary database tables for the SOA Suite.  The RCU can be run from any machine that can access the target database.  In 11g the RCU creates a number of pre-defined users and schema with a user defiend prefix.  This allows you to have multiple 11g installations in the same database. After running the RCU you need to grant some additional privileges to the soainfra user.  The soainfra user should have privileges on the transaction tables. grant select on sys.dba_pending_transactions to prefix_soainfra Grant force any transaction to prefix_soainfra Machines The cluster will be built on the following machines. EDG Name is the name used for this machine in the EDG. Notes are a description of the purpose of the machine. EDG Name Notes LB External load balancer to distribute load across and failover between web servers. WEBHOST1 Hosts a web server. WEBHOST2 Hosts a web server. SOAHOST1 Hosts SOA components. SOAHOST2 Hosts SOA components. BAMHOST1 Hosts BAM components. BAMHOST2 Hosts BAM components. Note that it is possible to collapse the BAM servers so that they run on the same machines as the SOA servers. In this case BAMHOST1 and SOAHOST1 would be the same, as would BAMHOST2 and SOAHOST2. The cluster may include more than 2 servers and in this case we add SOAHOST3, SOAHOST4 etc as needed. My cluster has WEBHOST1, SOAHOST1 and BAMHOST1 all running on a single machine. Software Components The cluster will use the following software components. EDG Name is the name used for this machine in the EDG. Type is the type of component, generally a WebLogic component. Notes are a description of the purpose of the component. EDG Name Type Notes AdminServer Admin Server Domain Admin Server WLS_WSM1 Managed Server Web Services Manager Policy Manager Server WLS_WSM2 Managed Server Web Services Manager Policy Manager Server WLS_SOA1 Managed Server SOA/BPM Managed Server WLS_SOA2 Managed Server SOA/BPM Managed Server WLS_BAM1 Managed Server BAM Managed Server running Active Data Cache WLS_BAM2 Managed Server BAM Manager Server without Active Data Cache   Node Manager Will run on all hosts with WLS servers OHS1 Web Server Oracle HTTP Server OHS2 Web Server Oracle HTTP Server LB Load Balancer Load Balancer, not part of SOA Suite The above assumes a 2 node cluster. Network Configuration The SOA cluster requires an extensive amount of network configuration.  I would recommend assigning a private sub-net (internal IP addresses such as 10.x.x.x, 192.168.x.x or 172.168.x.x) to the cluster for use by addresses that only need to be accessible to the Load Balancer or other cluster members.  Section 2.2, "Network", of the EDG covers the network configuration in detail. EDG Name is the hostname used in the EDG. IP Name is the IP address name used in the EDG. Type is the type of IP address: Fixed is fixed to a single machine. Floating is assigned to one of several machines to allow for server migration. Virtual is assigned to a load balancer and used to distribute load across several machines. Host is the host where this IP address is active.  Note for floating IP addresses a range of hosts is given. Bound By identifies which software component will use this IP address. Scope shows where this IP address needs to be resolved. Cluster scope addresses only have to be resolvable by machines in the cluster, i.e. the machines listed in the previous section.  These addresses are only used for inter-cluster communication or for access by the load balancer. Internal scope addresses Notes are comments on why that type of IP is used. EDG Name IP Name Type Host Bound By Scope Notes ADMINVHN VIP1 Floating SOAHOST1-SOAHOSTn AdminServer Cluster Admin server, must be able to migrate between SOA server machines. SOAHOST1 IP1 Fixed SOAHOST1 NodeManager, WLS_WSM1 Cluster WSM Server 1 does not require server migration. SOAHOST2 IP2 Fixed SOAHOST1 NodeManager, WLS_WSM2 Cluster WSM Server 2 does not require server migration SOAHOST1VHN VIP2 Floating SOAHOST1-SOAHOSTn WLS_SOA1 Cluster SOA server 1, must be able to migrate between SOA server machines SOAHOST2VHN VIP3 Floating SOAHOST1-SOAHOSTn WLS_SOA2 Cluster SOA server 2, must be able to migrate between SOA server machines BAMHOST1 IP4 Fixed BAMHOST1 NodeManager Cluster   BAMHOST1VHN VIP4 Floating BAMHOST1-BAMHOSTn WLS_BAM1 Cluster BAM server 1, must be able to migrate between BAM server machines BAMHOST2 IP3 Fixed BAMHOST2 NodeManager, WLS_BAM2 Cluster BAM server 2 does not require server migration WEBHOST1 IP5 Fixed WEBHOST1 OHS1 Cluster   WEBHOST2 IP6 Fixed WEBHOST2 OHS2 Cluster   soa.mycompany.com VIP5 Virtual LB LB Public External access point to SOA cluster. admin.mycompany.com VIP6 Virtual LB LB Internal Internal access to WLS console and EM soainternal.mycompany.com VIP7 Virtual LB LB Internal Internal access point to SOA cluster Floating IP addresses are IP addresses that may be re-assigned between machines in the cluster.  For example in the event of failure of SOAHOST1 then WLS_SOA1 will need to be migrated to another server.  In this case VIP2 (SOAHOST1VHN) will need to be activated on the new target machine.  Once set up the node manager will manage registration and removal of the floating IP addresses with the exception of the AdminServer floating IP address. Note that if the BAMHOSTs and SOAHOSTs are the same machine then you can obviously share the hostname and fixed IP addresses, but you still need separate floating IP addresses for the different managed servers.  The hostnames don’t have to be the ones given in the EDG, but they must be distinct in the same way as the ETC names are distinct.  If the type is a fixed IP then if the addresses are the same you can use the same hostname, for example if you collapse the soahost1, bamhost1 and webhost1 onto a single machine then you could refer to them all as HOST1 and give them the same IP address, however SOAHOST1VHN can never be the same as BAMHOST1VHN because these are floating IP addresses. Notes on DNS IP addresses that are of scope “Cluster” just need to be in the hosts file (/etc/hosts on Linux, C:\Windows\System32\drivers\etc\hosts on Windows) of all the machines in the cluster and the load balancer.  IP addresses that are of scope “Internal” need to be available on the internal DNS servers, whilst IP addresses of scope “Public” need to be available on external and internal DNS servers. Shared File System At a minimum the cluster needs shared storage for the domain configuration, XA transaction logs and JMS file stores.  It is also possible to place the software itself on a shared server.  I strongly recommend that all machines have the same file structure for their SOA installation otherwise you will experience pain!  Section 2.3, "Shared Storage and Recommended Directory Structure", of the EDG covers the shared storage recommendations in detail. The following shorthand is used for locations: ORACLE_BASE is the root of the file system used for software and configuration files. MW_HOME is the location used by the installed SOA/BPM Suite installation.  This is also used by the web server installation.  In my installation it is set to <ORACLE_BASE>/SOA11gPS2. ORACLE_HOME is the location of the Oracle SOA components or the Oracle Web components.  This directory is installed under the the MW_HOME but the name is decided by the user at installation, default values are Oracle_SOA1 and Oracle_Web1.  In my installation they are set to <MW_HOME>/Oracle_SOA and <MW_HOME>/Oracle _WEB. ORACLE_COMMON_HOME is the location of the common components and is located under the MW_HOME directory.  This is always <MW_HOME>/oracle_common. ORACLE_INSTANCE is used by the Oracle HTTP Server and/or Oracle Web Cache.  It is recommended to create it under <ORACLE_BASE>/admin.  In my installation they are set to <ORACLE_BASE>/admin/Web1, <ORACLE_BASE>/admin/Web2 and <ORACLE_BASE>/admin/WC1. WL_HOME is the WebLogic server home and is always found at <MW_HOME>/wlserver_10.3. Key file locations are shown below. Directory Notes <ORACLE_BASE>/admin/domain_name/aserver/domain_name Shared location for domain.  Used to allow admin server to manually fail over between machines.  When creating domain_name provide the aserver directory as the location for the domain. In my install this is <ORACLE_BASE>/admin/aserver/soa_domain as I only have one domain on the box. <ORACLE_BASE>/admin/domain_name/aserver/applications Shared location for deployed applications.  Needs to be provided when creating the domain. In my install this is <ORACLE_BASE>/admin/aserver/applications as I only have one domain on the box. <ORACLE_BASE>/admin/domain_name/mserver/domain_name Either unique location for each machine or can be shared between machines to simplify task of packing and unpacking domain.  This acts as the managed server configuration location.  Keeping it separate from Admin server helps to avoid problems with the managed servers messing up the Admin Server. In my install this is <ORACLE_BASE>/admin/mserver/soa_domain as I only have one domain on the box. <ORACLE_BASE>/admin/domain_name/mserver/applications Either unique location for each machine or can be shared between machines.  Holds deployed applications. In my install this is <ORACLE_BASE>/admin/mserver/applications as I only have one domain on the box. <ORACLE_BASE>/admin/domain_name/soa_cluster_name Shared directory to hold the following   dd – deployment descriptors   jms – shared JMS file stores   fadapter – shared file adapter co-ordination files   tlogs – shared transaction log files In my install this is <ORACLE_BASE>/admin/soa_cluster. <ORACLE_BASE>/admin/instance_name Local folder for web server (OHS) instance. In my install this is <ORACLE_BASE>/admin/web1 and <ORACLE_BASE>/admin/web2. I also have <ORACLE_BASE>/admin/wc1 for the Web Cache I use as a load balancer. <ORACLE_BASE>/product/fmw This can be a shared or local folder for the SOA/BPM Suite software.  I used a shared location so I only ran the installer once. In my install this is <ORACLE_BASE>/SOA11gPS2 All the shared files need to be put onto a shared storage media.  I am using NFS, but recommendation for production would be a SAN, with mirrored disks for resilience. Collapsing Environments To reduce the hardware requirements it is possible to collapse the BAMHOST, SOAHOST and WEBHOST machines onto a single physical machine.  This will require more memory but memory is a lot cheaper than additional machines.  For environments that require higher security then stay with a separate WEBHOST tier as per the EDG.  Similarly for high volume environments then keep a separate set of machines for BAM and/or Web tier as per the EDG. Notes on Dev Environments In a dev environment it is acceptable to use a a single node (non-RAC) database, but be aware that the config of the data sources is different (no need to use multi-data source in WLS).  Typically in a dev environment we will collapse the BAMHOST, SOAHOST and WEBHOST onto a single machine and use a software load balancer.  To test a cluster properly we will need at least 2 machines. For my test environment I used Oracle Web Cache as a load balancer.  I ran it on one of the SOA Suite machines and it load balanced across the Web Servers on both machines.  This was easy for me to set up and I could administer it from a web based console.

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  • Performance of Cluster Shared Volume file copy from SAN

    - by Sequenzia
    I am hoping someone can help me out with a strange issue. We are running a Microsoft Failover Cluster with Server 2008 R2 and an Equallogic PS4000 SAN. Our main configuration has 2 Dell Poweredge T710 Servers in the cluster. We have CSV and Quorm setup. The servers each have 10 Broadcom 1Gb NICs. Right now 4 of the NICS are on the iSCSI network for accessing the SAN. They use MPIO and the Dell HIT pack. We have 5 VMs running on each node and everything runs smooth. No noticeable performance issues or anything. From the SAN I can see the 4 iSCSI connections from each server to each volume (CSV and Quorm). Again, it seems to perform great. The problem I am running into is with backups. I have tried a few backup programs like backupchain and Veeam. The problem is both of them are very very slow to backup the VMs. For instance I have a 500GB (fixed disc) VHD that’s running on the cluster. It takes over 18 hours to backup that VHD and that’s with compression and depuping turned off which is supposed to be the fasted. We also have a separate server that is just for backups. It has a lot of directed attached storage. As part of the troubleshooting I decided to bring that server into the cluster as a node. It now has access to the CSV and can read from C:\clusterstorage\volume1 which is where our VHDs live. This backup server only has 2 NICs. 1 NIC is going to the iSCSI network and the other is just on the main network. It has Intel NICS in it without any sort of MPIO or teaming. So with the 3rd server now in the cluster I started doing some benchmarking. I have a test VHD that’s about 7GBs that’s stored in the CSV. I have tested file copying that VHD from all 3 servers to directed attached storage in the respective server. The 2 Dell servers that are the main nodes in the cluster (they house the VMs) are reading that file at about 20Mbs/Sec. Which at that rate is way to slow for the backups. The other server which only has 1 NIC to the SAN is reading at around 100Mbs/Sec. I spent a few hours on the phone with Dell today about this . We went through all kind of tests and he was pretty dumb founded. He really has no idea why that server with only 1 NIC is reading about 5 times as fast as the servers with 4 NICS and MPIO. We looked at the network utilization of the NICs while the file copy was going on. The servers with the 4 NICs had a small increase of activity during the file copy but they only went up to around 8-10% on all 4 NICs. The other server with the 1 NIC jumped up to over 80% during the file copy. I plan on doing some more testing after hours and calling Dell back tomorrow but I really am confused (and so is Dell’s support rep) why I cannot get faster file copy access to the CSV on those servers. Anyone have any input on this? Any feedback would be greatly appreciated. Thanks in advance.

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  • Mod disk_cache permanent caching images and disabling reacurring header updates

    - by user135532
    I am trying to get mod disk_cache to permantly cache images retrieved from an image server on the webserver using ProxyPass. While the image is being retrieved correctly from the server and is served from the cache on further requests, then I am still having the webserver call the image server and causing the cached header to be updated. Because of load concerns then I need to never call the image server on a specific url again after it has been cached once, or extend the refresh time for as long as possible. The webserver is IHS 7.0 The mod's are mod_disk_cache.so, mod_cache.so, mod_proxy.so Version 2.2.8.0 Following is from my httpd.conf: ProxyPass /webserver/media/images/ http://imageserver.com/ws/media/images/ # Caching pictures <IfModule mod_cache.c> <IfModule mod_disk_cache.c> CacheDefaultExpire 2628000 #CacheDisable CacheEnable disk /webserver/media/images/ CacheIgnoreCacheControl On CacheIgnoreHeaders Cookie Referer User-Agent X-Forwarded-For X-Forwarded-Host X-Forwarded-Server Accept-Language Accept Host CacheIgnoreNoLastMod On CacheIgnoreQueryString Off #CacheIgnoreURLSessionIdentifiers CacheLastModifiedFactor 10000000.1 #CacheLock on #CacheLockMaxAge 5 #CacheLockPath CacheMaxExpire 1576800 CacheStoreNoStore On CacheStorePrivate On CacheDirLength 2 CacheDirLevels 3 CacheMaxFileSize 1000000 CacheMinFileSize 1 CacheRoot c:/cacheroot2 </IfModule> </IfModule>

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  • Top Reasons to Take the MySQL Cluster Training

    - by Antoinette O'Sullivan
    Here are the top reasons to take the authorized MySQL Cluster training course: Take training which was developed by MySQL Cluster product team and delivered by the MySQL Cluster experts at Oracle Learn how to develop, deploy, manage and scale your MySQL Cluster applications more efficiently Keep your mission-critical applications and essential services up and running 24x7 Deliver the highest performance and scalability using MySQL Cluster best practices In this 3 day course, experienced database users learn the important details of clustering necessary to get started with MySQL Cluster, to properly configure and manage the cluster nodes to ensure high availability, to install the different nodes and provide a better understanding of the internals of the cluster. To see the schedule for this course, go to the Oracle University Portal (click on MySQL). Should you not see an event for a location/date that suits you, register your interest in additional events. Here is a small sample of the events already on the schedule for the MySQL Cluster course:  Location  Date  Delivery Language  Prague, Czech Republic  17 September 2012  Czech  Warsaw, Poland  1 August 2012  Polish  London, United Kingdom  18 July 2012  English  Lisbon, Portugal  3 December 2012  European Portugese  Nice, France  8 October 2012  French  Barcelona, Spain  25 September 2012  Spanish  Madrid, Spain  20 August 2012  Spanish  Denver, United States  17 October 2012  English  Chicago, United States  22 August 2012  English  Petaling Jaya, Malaysia  10 October 2012  English  Singapore  21 August 2012  English  Mexico City, Mexico  23 July 2012  Spanish

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  • Changing Corosync/Heartbeat pair's active node based on MySQL/Galera cluster state

    - by Hace
    Background I'm planning on building a High Availability "cluster" for our Zabbix instance by placing two physical servers in one server room and two in another server room. In each server room one of the physical servers will run Zabbix on RHEL and the other will run Zabbix's MySQL database, also on RHEL. I'd prefer synchronous replication for the MySQL nodes so I'm planning on using Galera in a master-slave configuration. The Zabbix instances on the two Zabbix servers would be controlled by Heartbeat/Corosync (although Red Hat Cluster Suite is also an option...) If the Zabbix server in Server Room A goes down, the one in Server Room B becomes active (and vice versa). Ditto for the MySQL servers/instances. If either of those cases happen, however, the connection between the Zabbix server and the MySQL server becomes significantly slower as ti has to travel over WAN. Question Is it possible to configure the Heartbeat/CoroSync pair to instruct the MySQL/Galera cluster to change the master node to switch to (if available) the one that's in the server room as the active Heartbeat/Corosync -node and (more challengingly) is it possible to do the same in the other direction, i.e have the Galera cluster change the active Heartbeat/CoroSync server to be in the same room as the active MySQL master server in case of a failover in over to avoid unnecessary WAN transfers between the application and its DB? Theories Most likely I can get CoroSync to run something that'd log in to one of the DB nodes to change the MySQL/Galera master but I don't know if it's really possible to do anything similar in the other direction in Galera. Is it possible to define a "service" in CoroSync/Heartbeat so that both the service and its MySQL service would migrate as one if possible. Using the DB server that's behind WAN should still be a better option to DB downtime. Am I just using too many tools to solve a problem that'd be far simpler with something else?

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  • Android landscape mod game.

    - by davidv
    I am beginner in android game development. I want my game to run only in landscape fullscreen mod (currently I have Optimus 2X with resolution 800x480 in landscape), and I dont know how to set it. I found the fullscreen mod settings, and tried some landscape mod (set orientation:landscape in AndroidManifest), but the game is now crashing and its very unstable (eg. when i change phone orientation). So is there any way to do that? Thank you for help.

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  • How do I configure permissions for a cluster share using Powershell on 2008?

    - by Andrew J. Brehm
    I have a cluster resource of type "file share" but when I try to configure the "security" parameter I get the following error (excerpt): Set-ClusterParameter : Parameter 'security' does not exist on the cluster object Using cluster.exe I get a better result, namely the usual nothing when the command worked. But when I check in Failover Cluster Manager the permissions have not changed. In Server 2003 the cluster.exe method worked. Any ideas? Update: Entire command and error. PS C:\> $resource=get-clusterresource testshare PS C:\> $resource Name State Group ResourceType ---- ----- ----- ------------ testshare Offline Test File Share PS C:\> $resource|set-clusterparameter security "domain\account,grant,f" Set-ClusterParameter : Parameter 'security' does not exist on the cluster object 'testshare'. If you are trying to upda te an existing parameter, please make sure the parameter name is specified correctly. You can check for the current par ameters by passing the .NET object received from the appropriate Get-Cluster* cmdlet to "| Get-ClusterParameter". If yo u are trying to update a common property on the cluster object, you should set the property directly on the .NET object received by the appropriate Get-Cluster* cmdlet. You can check for the current common properties by passing the .NET o bject received from the appropriate Get-Cluster* cmdlet to "| fl *". If you are trying to create a new unknown paramete r, please use -Create with this Set-ClusterParameter cmdlet. At line:1 char:31 + $resource|set-clusterparameter <<<< security "domain\account,grant,f" + CategoryInfo : NotSpecified: (:) [Set-ClusterParameter], ClusterCmdletException + FullyQualifiedErrorId : Set-ClusterParameter,Microsoft.FailoverClusters.PowerShell.SetClusterParameterCommand

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  • Building a new cluster for mathematical calculations (Win/Lin)

    - by Muhammad Farhan
    I would like to build a new cluster to perform heavy mathematical calculations in Matlab and Abaqus. One of my friend told me that distributed computing is way faster than parallel computing, which is very true after reading a bit on the internet. However, I have never clustered before. Current workstation I own: Dell Precision T5400 2 x Intel Xeon 2.5 GHz 16 GB RAM (2GB x 8) 1 x Western Digital 1TB HDD 7200 rpm 1 x nVidia Quadro FX4600 768MB GPU 1 x 870W PSU OS: Windows 7 Ultimate 64-bit 2nd WS: I can buy another WS similar configuration to the one I own I am not bothered about OS, I am willing to cluster with either Windows or Linux. However, my software are compatible with windows 64-bit only. Please help me setup a cluster. Thank you.

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  • First Minecraft mod not working: make a new sword

    - by yamikoWebs
    I am making my first mod and cannot see what is wrong with it. I am using MCP and Modloader. For my first mod I was going to make swords. I started with making a new EnumToolMaterials WOOD(0, 59, 2.0F, 0, 15), STONE(1, 131, 4.0F, 1, 5), IRON(2, 250, 6.0F, 2, 14), LAPIS(3, 750, 7.0F, 2, 14), OBSIDIAN(3, 1000, 7.5F, 3, 12), EMERALD(3, 1561, 8.0F, 3, 10),//diamond GREEN(3, 2000, 9.0F, 4, 10),//emerald GOLD(0, 200, 12.0F, 0, 22); then here is the mod class public class _Mod_Yamiko extends BaseMod{ /* mod itemts */ public static final Item swordLapis = (new ItemSword(600, EnumToolMaterial.LAPIS)).setItemName("swordLapis"); public static final Item swordObsidian = (new ItemSword(601, EnumToolMaterial.OBSIDIAN)).setItemName("swordObsidian"); public static final Item swordGreen = (new ItemSword(602, EnumToolMaterial.GREEN)).setItemName("swordGreen"); public void load(){ //set images swordLapis.iconIndex = ModLoader.addOverride("/gui/items.png","/gui/swordLapis.png"); ModLoader.addName(swordLapis, "Lapis Sword"); //craft ModLoader.addRecipe(new ItemStack(_Mod_Yamiko.swordLapis, 1), new Object[]{ " X ", " X ", " Y ", 'X', Block.dirt, 'Y', Item.stick }); } public String getVersion(){ return "0.1"; } } Then I made a 16×16 .png image. I am not sure where to save it so I recompiled and reobfuscated, took the mod files and put it in my local Minecraft install, added the image where it be should be. No problems when playing but I cannot make the new sword.

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  • mysql cluster virtual ip

    - by user225995
    I am new in mysql cluster and mysql cluster and versions are not my choice. I setup four machines. Two of them manager , Two of them data cluster (ndb and mysqld). And i integrate with mysql utilities master/slave configuration. Everything working fine. Mysql version 5.6.17, ndb 7.3.5 , servers ubuntu 14.04. There will be no much transactions. The only important thing is HA. Everythings must be double. My problem is virtual ip. Since I have only one farm which have master slave configuration, how can i do it without proxy? If I must use proxy which proxy is better?

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  • Installing DB2 in Windows 2003 Cluster

    - by radoslawc
    How can I install db2 with already created domain user? Or maybe there is no need, just install with local user db2admin and then create instance using existing domain user? This is how it looks I've got win 2003 cluster single quorum, I have to move db2 database to another cluster in same domain. I've added resources to new cluster like in IBM redbook, and I have problem adding db2 resource. I've got service account DOMAIN\serviceaccount and DOMAIN\db2_instance owner, to install db2 do I have to log in as db2_instance_owner? Thanks in advance

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  • Is this a HPC or HA mySQL cluster?

    - by Louise Hoffman
    Can someone tell me if this is a High Performance Compute or High Available mySQL cluster? There is a picture of the setup. This is part of the config.ini they talk about [ndbd default] NoOfReplicas=2 # Number of replicas Is it correct understood that NoOfReplicas determines if I have a HPC or a HA cluster?

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  • Solaris cluster - what is running where

    - by Eddy
    Hello, how can one tell which resources (FS, process etc....) are part of a specific cluster configuration? IE: after logging in to the global zone, how can I identify the resources that are running under cluster monitoring? Regards, Edoardo

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  • How can I enable logging for requests going through mod proxy

    - by Kariem
    Is there a way to log requests going through mod proxy? I need a way to debug my configuration, because I don't seem to be getting where I should be. I need the following information: headers of incoming requests what is being sent to the proxy target Maybe a related question: is there a way to strip some headers? I tried the following: ProxyPass /proxy/other http://not.under.my.control/ <Location /proxy/other> ProxyPassReverse / RequestHeader unset Authorization </Location> I don't really know whether this is ok, because I don't see anything. Thank you, Kariem

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