It is possible and effective: high availability (failover) on 2 guests with local storage?

Similar Questions

• Remove the secondary controller and tertiary high availability for each access point

  I want to remove secondary and tertiary sector controller of high availability for each access point. I have more than 900 APs associated with a Version of the WLC 8510 8.0.121.0 software. What is the best/better way to remove secondary and tertiary controller?
  Or I can create a model first. We use version 2.2

  Hello

  Easiest way:

  Yes you can do this by using the first Cisco Infrastructure, you can create a Setup AP Lightweight model to specify the name of the PDC and the IP address and specify an empty value (choose the first empty option in the drop-down list) and 0.0.0.0 for the secondary and tertiary sector controllers.  Then you can apply this model to the AP, and she must remove (virgins all) values for these fields.

  Long way:

  Yes there is no clean way to remove it from the CLI. you need to manually remove each on the AP.

  Concerning

  Remember messages useful rates

• HA - guests with local VMFS and SAN devices

  I have 4 guests of u2 ESX VSphere DRS cluster and you want to enable HA.

  The hosts have all VM on DAS and share SAN volumes.

  The machine virtual on the DAS is non-critical test servers which will not need failover in the event of a host failure, but will the VM SAN.

  My question is:

  How will the HA react in this environment? There are toggled it can (the basic VM SAN) and ignore the das servers?

  Havn't had any material to spare to test now

  Thanks in advance

  Exactly.  What can the failover is going.

• OBIEE 11 g high availability/evolution using two servers

  Hi all
  
  I have 2 servers from Redhat Linux 64 bits.
  By using these 2 servers, I want to achieve high availability & failover.
  
  I have installed OBIEE (installation of the company) on the first server (main node) and the scale on the field on the second server (secondary node).
  
  Now, if the master goes down because of a reason any (by example-failure), will be the administrator of the server on the secondary node becomes active?
  My goal is to provide a system with minimal downtime.
  
  Please advice.
  
  Thank you
  Nitin Aggarwal

  Make sure the parameter EM is defined: virtualize = true

  This means that if the server administrator is no longer available, the servers BI will be always available for all users

  http://docs.Oracle.com/CD/E21764_01/bi.1111/e10543/authentication.htm#BIESC6075

• Local storage and multiple ESXi hosts

  Hi, I was wondering how vWorkspace manages local storage in an environment with a single server Vcenter and two ESXi, with a local data store each.

  If I store a 'master' (I mean the gold statue) vm on the local storage of an ESXi, can replicate vWorkspace this virtual machine to the local storage of the other ESXi as Citrix VIAB?

  If not, how can I use both my ESXi servers with local storage and maybe provide some sort of HA?

  Am I forced to use a storage shared, if I want to be able to deploy clones related both to my ESXI?

  Thanks in advance.

  Hello

  Use vSAN, or no matter what virtual SAN Appliance as an iSCSI SAN storage to prosecute two storage facilities... You can replicate between the two servers and same LUNS are used by vWorkspace.

  • StarWind free iSCSI Solution A
  • OpenFiler
  • vSAN
  • Open-e iSCS SAN

  Quick search... www.unixarena.com/.../Top-10-Storage-appliance.html

• How to set up the single instance of data of high availability and disaster tolerance

  Hi Experts,

  I have unique database and instance need to configure for high availability and disaster tolerance

  What are the DR options available for synchronization of database at a remote site with a delay of 5 to 10 minutes.

  Application connects to the local site and DR site should be the remote site.

  1 oracle FailSafe with SAN?

  2. What is the security integrated on linux centos/oel solution?

  3. If the storage is on the San (for example) then is it possible to set up a shell script

  which detects if the source database is down for 5 minutes, ride the SAN stored the files of database on the remote computer and

  change the ip in the application, so it will never connect to the source ip address

  Thank you and best regards,

  IVW

  Hello

  Rupture can occur in any level

  1 oracle FailSafe with SAN?

  --> Do check if you have failure in storage, your security will do nothing to bring back data

  --> Seen failsafe, will be only the insurance when MS cluster moving the disc and services to different node, configured services starts.

  2. What is the security integrated on linux centos/oel solution?

  --> Under linux, you need to set the scripts to run, and you can check the option on the cluster OS

  3. If the storage is on the San (for example) then it is possible to configure a shell script that detects if data source is down for 5 minutes, mount SAN stored the files of database on the remote computer and

  change the ip in the application, so it will never connect to the source ip address

  --> This you will get a cluster of BONES...

  Points to note:

  ================

  --> If there is power failure sudden, we can expect there may be lost writing in your data block, which will bring the inconsistency to your data file and redo

  --> Here, there is problem with your drive?

  --> If there is problem with your complete domain controller (how will you mount FS to a remote server?)

  Note what we are discussing was HA and you try to keep an idle server all the time (you have a server with more RAM & CPU)

  Why you can't check an option of CARS, can also have the cluster extension...

  And to avoid the loss of data and to meet the RPO and RTO in all time (same DC came down, storage failure, server crash), you may need to use Oracle data guard...

  Ask questions if you have

  Thank you

• is it possible to get Illustrator and effects for free?

  Hi im a student currently attending year 10 and my COMPUTER teacher need me to work on my assignment at home I only get to have illustrator for a month, but I need more than a month. so is it possible I can get for free or extended by 6 months of illustrator and aftermath?

  Hi kierane37415643,

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• VPN high availability: double 3 k in the hub and the PIX as rays

  Hi Experts.

  In my scenario, I need routing between the rays and, above all, high availability (HA).

  On the shelves, I have Pix 501/506E, OS ver 6.3. In the hub, I have a couple of redundant VPN3k.

  What mechanism is the best:

  1 - hub and spoke topology with remote EzVPN in rays - to HA, I can take advantage of the "load balancing" feature of the VPN3k?

  2 - hub and spoke topology with remote EzVPN in rays - to HA, I can take advantage of the "backup server" feature of the VPN3k?

  3 any-to-any topology (an IPSEC tunnel between any pair of sites) - for HA, I can take advantage of the 'LAN-to-LAN backup' feature of the VPN3k?

  Thank you

  Michele

  I'd go with NLB on the backup server. With load balancing your connections will be spread over the two hubs. If a hub dies, then at least it will only affect half of your connections, rather than each of them in case of death of your primary and backup servers using.

  If a hub dies, your PIX connections will be de-energized for a short period, but they will be able to reconnect back automatically without making you no change.

• Exchange 2010 and high availability (redundancy)

  Hello

  If virtualize us Exchange 2010 on VMware and Vmotion used for high availability (redundancy). (that is, if we do not have to use Exchange clusters.)  Claims we're still two x licenses Exchange 2010?

  Thank you

  Yes, you will need two exchange server license, if you have less than 5 databases in exchange, you can opt for the standard edition of Exchange. However the operating system you will be required Enterprise edition, as it is necessary for the cluster configuration.

• Is required for high availability and the DRS Vmware-AAM service? Has it been renamed with ESX3.5 U3?

  Hello Tech community.

  Is required for high availability and the DRS Vmware-AAM service? Has it been renamed with ESX3.5 U3?

  On one of our ESX 3.5 U3 infrastructure, VMware Ha and DRS work very well, and the following list of services are started, view VMware-AAM

  Here is an exit of an ESX 3.5 U3 system

  1. service - status-all | grep running

  crond (pid 1900) is running...

  gpm (pid 1851) is running...

  VMware-pass (pid 1942) is running...

  ntpd (pid 1842) is running...

  cimserver (pid 2452) is running...

  snmpd (pid 1557) is running...

  sshd (pid 4074 4037 1566) is running...

  syslogd (pid 1321) is running...

  klogd (pid 1325) is running...

  At least a virtual machine is still running.

  VMware-aam is running

  VMware VMkernel authorization daemon is running (pid 1911).

  VMware-vpxa is running

  webAccess (pid 1880) is running...

  openwsmand (pid 2534) is running...

  xinetd (1827 pid) is running...

  Now on our production VMware MCC cluster ESX 3.5 Update 2 we do not find "vmware-aam" this service but HA and DRS work very well, and the logs in/var/log/vmware/MAA indicate that everything is fine.

  1. service - status-all | grep running

  crond (pid 2033) is running...

  gpm (pid 1882) is running...

  hpasmd is running...

  cmathreshd is running...

  cmahostd is running...

  cmapeerd is running...

  cmastdeqd is running...

  cmahealthd is running...

  cmaperfd is running...

  cmaeventd is running...

  cmaidad is running...

  cmafcad is running...

  cmaided is running...

  cmascsid is running...

  cmasasd is running...

  cmanicd (pid 2703) is running...

  cmasm2d is running... [OK]

  hpsmhd (1986 1955 pid) is running...

  VMware-pass (pid 3502) is running...

  ntpd (pid 1873) is running...

  USE: Departure from OVCtrl | stop | restart | START | STOP | activate | Disable

  USE: Departure from OVTrcSrv | stop | restart

  cimserver (pid 3536) is running...

  Ramchecker is not running

  snmpd (pid 1745) is running...

  sshd (pid 1861 1447 1754) is running...

  syslogd (pid 1684) is running...

  klogd (pid 1688) is running...

  At least a virtual machine is still running.

  VMware VMkernel authorization daemon is running (pid 3472).

  VMware-vpxa is running

  webAccess (pid 1984) is running...

  openwsmand (pid 3642) is running...

  xinetd (pid 1854) is running...

  I did a few Google queries and couldn't find a definitive answer

  The service of AAM is required for HA - it is not required for DTH

  If you find this or any other answer useful please consider awarding points marking the answer correct or useful

• Recovery of MRI, clustering and high availability

  Is there a documentation or best practices out there on the MRI and recovery after disaster, clustering and high availability? I see nothing in the document in this regard.
  
  Thanks a ton!

  I just wrote an article on this topic, take a look.

  http://blogs.Oracle.com/IRM/2009/06/setting_up_an_oracle_irm_serve.html

  Concerning

  Simon Thorpe
  http://blogs.Oracle.com/IRM/

• Fabric interconnecting Cisco high availability

  Hi Experts,

  I would like to know,

  (1) what does fabric adapter interconnection cluster (L1, L2) ports are using high availability?

  (2) can form us able to interconnect fabric and fabric interconnection interconnection 6100 6200 to a cluster? If ok means how they exchange of history since the two are completely different material. ?

  Thanks in advance,

  Jako Raj

  Hello

  (1) L1 and L2 ports are used for the purpose of managing only basically to synchronize data management, triggering a possible failover.

  (2) different hardware platforms are supported in the same cluster only in a process of upgrading equipment. Actually what really happens in this meanwhile is the copy of the configuration and the new FI is promoted as primary. Although he works as a group, he is an active-standby cluster, where a single FI acts as principal.

  Kind regards

• High availability with two 5508 WLAN controllers?

  Hi all

  We are considerung to implement a new wireless solution based on Cisco WLC 5508 and 1262N Access Points. We intend to buy about 30 access points and have two options: either buy a WLC 5508-50 or, for redundancy to, two controllers 5508-25.

  Is it possible to configure two WLC 5508 as a high availability solution, so that all access points are distributed on the two WLCs and during breaks WLC one another case manages all the APs?

  If we have 30 access points, and one of the two WLC 5508-25 breaks of course that not all access to 30 but only 25 points can be managed by one remaining. Is there some sort of control to choose the access points must be managed and which do not?

  How does such a configuration looks like in general, is the implementation of an installation of two controller quite complex or simple?

  Thank you!

  Michael

  Hi Michael,

  Do not forget that the 5508 works with a system of licensing. The hardware can support up to 500 APs, but it depends on the license that you put in.

  I think 2 5508 with 25 APs license will be more expensive than a 5508 with 50 APs license.

  If you have 2 WLCs, the best is NOT to spread access between the WLCs points. In doing so, you increase the complexity of homelessness (WLCs have to discount customers to each other all the time). If your point was to gain speed, it really doesn't matter as the 5508 can have up to 8 Gbit/s of uplink speed and has the ability of UC to treat 50 APs with no problems at all. So I find it best to have all the access points on 1 WLC, then if something goes wrong, all the APs migrate anyway for the other WLC.

  If you want 50 APs at a 25-degree WLC failover, you can select who will join Yes. The APs have a priority system, so you assign priorities. If the WLC sees it's full capacity but higher priority APs are trying to join, it will kick down-prio APs for the high prio allow to connect.

  WLCs is not exactly "HA." It's just that if you have 2 WLCs work together (as if you had 700 APs and needed to put 2 WLCs) and delivered to customers. Or all APs sat on a WLC and when it breaks down, they join the other available controller.

  The only thing to do is to put each WLC in the same group of mobility so that they know.

• VSphere hosts high availability 2

  Hi all

  I am trying to achieve the following by using the essential plus the package. I had 2 identical machines with 2 TB of storage. The two are running ESXI and I want to configure high availability and load the pendulum. From what I've read on for them is that vmware needs shared storage so kind of san if I want to use high availability. But I don't have this machine, what I want to achieve is the following: Vmware reflects the discs on both machines (network raid 1) and if a hardware failure occurred on one of them, the other machine will start all the vm remaining. In the same way vmware should do load balancing. From what I've read on the internet vmware had VSA, but this has been discontinued. VSAN is not an option, because I don't have 3 machines. One possible option would be for example starwind but I would have preferred an option of vmware itself.

  So in short it is a way to configure high availability and load with 2 hosts balancing and not shared storage? Preferably without third party software.

  Kind regards

  Sebastian Wehkamp

  Technically, you can use DRBD and Linux (or FreeBSD and POLE if you're on the dark side of the Moon) to create a device block tolerant replication between a pair of virtual machines running on a hypervisor nodes. Throw in

  failover NFSv4 point mounting on top and you have a nice VMware VM data store. Tons of a defined software storage vendors have exactly this ideology within their virtual storage devices if you do not go to the difference

  However as StarWind Virtual SAN is FREE for the installation of 2 knots in the scenario of VMware (Hyper-V licensing is different if you care) and can be run on a free Hyper-V Server (no need to pay for licenses of Windows), you CAN end up with a faster

  back from road StarWind. Depends on what you want from a set of functionality (iSCSI? NFS? SMB3? Online dedupe? Cache?) and what forum do you prefer for public support to ask questions

  --

  Thank you for your response. I thought that since preparations are exactly the same secondary machine would be able to easily start the vm of lost. For synchronization, I thought it would be something like drbd, when unable to connect with the other secondary hosts will become primary. This works in the case of a hardware failure, and network failure half a brain will take place that must be resolved manually. I play with it replicaton and reconsider the starwind software.

• WLC 5508 high availability

  Hello

  Today I have two WLC 5508 (with license for 100 AP each of them), on a single site.

  The WLC work availability (active-standby).

  However, we have a new scenario, with 02 sites: A and B (attachment).

  I would like to know if it is possible to work as follows:

  The WLC - A as the main controller of site A. WLC - B as a backup (BDC) of WLC.-a.

  The WLC - B that has the PDC site B. WLC - as a backup (BDC) to WLC - B.

  For example:

  If WLC - a falls, site access Points are managed by B WLC site - B and vice versa.

  Is this possible?

  How can I configure the new scenario? Don't forget, there is a site-to-site between Site A and Site b.

  Another point:

  If I add more than 50 APs on Site A. How does the license number?

  Should I buy a license for the two WLC?

  TKS,

  >....

  >.. .is it possible?

  No. , high availability in terms of controller is supposed to be what is said, the backup controller is not 'full' - stby and cannot play other roles.

  M.