How many standby cm?

Hi,
currently i have two CM. A primary and a standby. As a requirement of a DRP site i have to deploy another standby CM. Is it possyble? there is any restriction on the number of standby CM?
thx
Rafaelgc

You can have many standby CMs, I think up to 8, but possibly even more then that. You should be fine with 2.
Thanks,
Dan

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Configuring data guard: how many standby redolog do I need?

Hi all, I want to add a standby databse to my RAC test environment but I don't understanad how many redolog I need.
The main db is a 2 node RAC (10.2.0.4.0); every node has 3 log groups; every log group has 2 logfile (every log group is multiplexed on DG_DATA1/ASR/ and FLASH_RECOVERY_AREA/ASR/ )
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Replication via rman works well, but I have to manually add the standby redolog on the standby db and which formula to use to calculate the number of the standby redolog needed. Which is the correct formula between :
1)
# of standby log = ( # of redolog files + 1) * # of thread = (6 +1)*2 = 14 standby redolog files
2)
# of standby log = ( # of redolog groups + 1) * # of thread = (3 +1)*2 = 8 standby redolog files
thanks,
andrea

Andrea,
I think 8 should be the answer on your question. Because you have 3 log groups and 2 threads therefore (3+1)*2 = 8.
According to the documentation :
http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/create_ps.htm#SBYDB00426
Minimally, the configuration should have one more standby redo log file group than the number of online redo log file groups on the primary database. However, the recommended number of standby redo log file groups is dependent on the number of threads on the primary database. Use the following equation to determine an appropriate number of standby redo log file groups:
(maximum number of logfiles for each thread + 1) * maximum number of threads
I think you may get confused with maximum number of logfiles. But sometimes logfile is used as a synonym to log group. The actual log group files are usually called log members. (for instance MAXLOGFILES parameter specifies the maximum number of log groups and MAXLOGMEMBERS specifies the maximum number of members for each group).
Each additional member in a redo log group is just a multiplexed copy. You can also consider multiplexing the standby redo log files, the same why you do for redo log members.
In order to learn more about the usage, benefits and limitations of Standby Redo Logs (SRL) you can refer to Metalink Note 2193444.1.
I hope this helps.
--Mihajlo

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i dont know why the battery life of my iphone 4 is so low ! i really want to know how many hours i'll have if it's on standby. And how many hours if i use it normally for music and facebook (sometimes a little bit games) !!!

to enhance your battery life, keep screen display to minimum, set screen lock automatically after 1 min, select internet notifications to off.

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Hi-
OK, let's talk power.... This is what we have to work with (may be slightly higher depending on PSU model):
DA 338W PSU
+5V=20A
+3.3V=24A
+28V=4.04A
+12V=8A
-12V=0.25A
Total on combined +3.3V and +5V =126W @32A
Of course, there is a big difference between idle and load power consumption, but I will list maximum power consumption values. Various requirements are:
ATA/100 Hard drive- Read/Write, approx. 12.8W [email protected], [email protected]
Optical Drive- Full Speed (42x) read, approx. 5.6W [email protected], 15.7W [email protected]
Memory (per 512mb DIMM) 1-3W combined 3.3V,+5V,[email protected]
PCI and AGP slots combined max +3.3V, +5V=62W, AGP (only) up to 20W
Firewire Bus 15W+25V
USB Bus 5v@500mA per port
733mhz PPC processor 1.6V 15.6W (Idle) 22.0W (load)
Fans (combined) +12V [email protected]
As for the Radeon 9800 Pro, under full load, the power requirements are:
+5V [email protected]
+12V [email protected]
+3.3V(AGP) [email protected]
+5V (AGP) [email protected]
+12V (AGP) [email protected]
Points to consider (no particular order):
-An ATA hard drive at idle, will still pull 7.2W and at Standby, will pull 1.4W.
-Unless you are running 2 RAID sets, you would rarely, if ever, have 4 drives simultaneously in Read/Write.
-One process that will push a system to the max is disc burning. Consider CPU at load, one, possibly two hard drives at Read/Write load, and the Optical drive at load. (For all who care, this is why we don't multi-task during burning). Without multi-tasking, the graphics power draw is minimal.
-Weak point of early ATX PSU revisions was the 12V rail. The G4 PSU also has a weak +12V rail (only 8A).
(Run a dual internal RAID, and try to burn a disc..... well, you better set the machine up as a headless server.....)
-Total combined +3.3V, +5V wattage and ampherage is sufficient for most fully loaded system and bus combinations.
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-Hard drives are heat producers, and an external firewire connected housing can allow for better overall system operation by reducing interior clutter and heat production.
-High interior temperatures reduce the ability of the PSU to cool itself, and thereby reduce it's ability to produce reliable power under load, in the heat.
-Old ATA hard drives are power hogs and hot in comparison to current SATA drives. Switching to two larger SATA drives will reduce load requirements by 3-4W per drive, as well as reduce heat production. Required use off a SATA PCI controller card eliminates the capacity restriction of the native ATA controller. Switching to SATA saves space, power, and cooling needs.
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Now, you decide....

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http://allthingsd.com/20120327/apple-ipad-battery-nothing-to-get-charged-up-abou t/
Apple Explains New iPad's Continued Charging Beyond 100% Battery Level
http://www.macrumors.com/2012/03/27/apple-explains-new-ipads-continued-charging- beyond-100-battery-level/
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http://www.iphonehacks.com/2012/03/new-ipad-takes-much-longer-to-charge-than-ipa d-2.html
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*** Pls rate all useful responses ****

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Fred Tech wrote:
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Here > http://support.apple.com/kb/HT1311
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How many standby cm?

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