S&P, esa agencia golpista

La agencia descalificadora #Standard&Poor's practica objetivamente el golpismo económico: lanza fal...

http://www.elpais.com/articulo/economia/Standard/26/Poor/s/agencia/golpista/elpepieco/20111117elpepieco_5/Tes
PABLO CRUCES
http://virtualshocks.blogspot.com

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"Isolation Response"... cual elegir?

Post de @DuncanYB sobre que opción elegir en la Isolation Response de HA en vSphere 5

http://www.yellow-bricks.com/2011/10/11/vsphere-5-ha-isolation-response-which-one-to-pick/

Resolve Heartbeat Split-brain syndrome

La mayoría de los casos de Split-Brain ser producen por las siguientes causas:

-perdida de conectividad entre los site por enlace WAN

-el servidor activo esta demasiado ocupado para responder las peticiones de heartbeat

-mala configuracion de heartbeat en alguno o ambos de los extremos.

Os dejo una guía para solucionarlo en caso de que se produzca:

Primero identificaremos cual es el vCenter con mas datos actualizados:

1 Check the date and time of files on both servers. Make the most up-to-date server the active server.

2 From a client PC on a LAN, run nbtstat -A 192.168.1.1 where the IP address is the Principal (Public) IP address of the server. This can help identify the MAC address of the server currently visible to client machines.

Después, seguiremos estos pasos para restablecer el activo-pasivo:

1 Identify the server with the most up-to-date data or the server to make active.

2 Shut down vCenter Server Heartbeat on both servers (if running).

3 On the server to make passive, right-click the Task bar icon, and select the Server Configuration wizard.

4 Click the Machine tab and set the server role to passive. Do not change the identity of the server (Primary

or Secondary).

5 Click Finish.

6 Restart this server.

7 Start vCenter Server Heartbeat, if required, and check that the Task bar icon now reflects the changes by

showing P / - (Primary and Passive) or S / - (Secondary and Passive).

8 On the active server, right-click the Task bar icon and select the Server Configuration wizard.

9 Click the Machine tab and verify that the server role is set to active. Do not change the identity of the

server (Primary or Secondary).

10 Click Finish.

11 Restart this server. As the server restarts, it connects to the passive server and starts replication. The active server overwrites data on the passive server.

12 Start vCenter Server Heartbeat, if required, and check that the Task bar icon now reflects the changes by showing P / A (Primary and active) or S / A (Secondary and active).

13 Start vCenter Server Heartbeat Console.

14 Check that the servers have connected and replication has started.

vCenter Server Heartbeat Protection Levels

This product protects the vCenter Server by two instances, one of them send alive messages (basically pings) over the VMware Channel, and in case of failure, initiating and automatic switchover.

The 5 levels protected by Hearbeat are:


-Server Protection – vCenter Server Heartbeat provides continuous availability to end users through a
hardware failure scenario or operating system crash. Additionally, vCenter Server Heartbeat ensures
users are provided with a replica server should the production server fail.

-Network Protection – vCenter Server Heartbeat proactively monitors the network by polling up to three
predefined nodes to ensure that the active server is visible on the network.

-Application Protection – vCenter Server Heartbeat maintains the application environment ensuring that
applications and services stay alive and available on the network.

-Performance Protection – vCenter Server Heartbeat proactively monitors system performance attributes
to ensure the system administrator is notified of problems. Additionally, it can be configured to take

-Data Protection – vCenter Server Heartbeat intercepts all data written by users and applications, and
maintains a copy of the data on the passive server that can be used in the event of a failure.

Apple patenta una tarjeta SIM que le daría el control del cliente frente a las operadoras

Un motivo mas para no vivir y morir con la manzanita a cuestas...

"Apple ha patentado una tarjeta SIM virtual que, embebida en los teléfonos móviles, quitaría el contr...

http://www.elpais.com/articulo/tecnologia/Apple/patenta/tarjeta/SIM/le/daria/control/cliente/frente/operadoras/elpeputec/20111114elpeputec_1/Tes
PABLO CRUCES
http://virtualshocks.blogspot.com

Enviado desde mi BlackBerry® de Vodafone