
1. Re: Ideal Bandwidth for our Prod DG
Hemant K Chitale Feb 4, 2014 12:51 AM (in response to petraK)Use arithmetic ? Take the average for the 0 hour run ==> 26.6 multiply it by 250(is it MBytes or MBits ?) Divide by 3600 to get the required M(bytes or bits ?). Then apply a transmission overhead of 20% to get the required bandwidth per second.
Hemant K Chitale

2. Re: Ideal Bandwidth for our Prod DG
petraK Feb 4, 2014 1:17 AM (in response to Hemant K Chitale)Thanks Hemant,
You are really a genius
By the way should I use the daily average or the Peak day? or Peak hour?
Database Daily Avage Number of Logs Daily Peak Hourly Peak Logsize Mb prod1 111.2 7 4 250 prod2 45.8 152 84 250 prod3 16.2 7 4 100 prod4 4.1 7 4 100 prod5 4.1 175 34 100 prod6 3.6 34 11 100 
3. Re: Ideal Bandwidth for our Prod DG
Hemant K Chitale Feb 4, 2014 1:47 AM (in response to petraK)>the daily average or the Peak day? or Peak hour?
You choose. OR ask your manager to choose.
Hemant K Chitale

4. Re: Ideal Bandwidth for our Prod DG
petraK Feb 4, 2014 1:49 AM (in response to Hemant K Chitale)Hi Hemant,
***Use arithmetic ? Take the average for the 0 hour run ==> 26.6 multiply it by 250(is it MBytes or MBits ?) Divide by 3600 to get the required M(bytes or bits ?). Then apply a transmission overhead of 20% to get the required bandwidth per second.
Is my arithmetic correct?
26.6*250/3600 = 1.84722222
20% of 1.84722222= 0..36944444
1.85+0.37=2.22Mbps?

5. Re: Ideal Bandwidth for our Prod DG
Hemant K Chitale Feb 4, 2014 1:51 AM (in response to petraK)Is the 250 MBYTES or MBITS ? Disk usage is generally in MBYTES , network bandwidth is generally in MBITS.
So the 2.2 if it is MBYTES becomes 17.6MBITS
Hemant K Chitale

6. Re: Ideal Bandwidth for our Prod DG
petraK Feb 4, 2014 2:40 AM (in response to Hemant K Chitale)Yeah 250 is the redo log size so definitely it is in Mbytes
How did you come up the 2.2Mbytes to 17.2 Mbits? what is the formula you used.
Thanks

7. Re: Ideal Bandwidth for our Prod DG
Hemant K Chitale Feb 4, 2014 2:44 AM (in response to petraK)>So the 2.2 if it is MBYTES becomes 17.6MBITS
Elementary knowledge. 1 Byte is 8 Bits.
Hemant K Chitale

8. Re: Ideal Bandwidth for our Prod DG
petraK Feb 4, 2014 7:02 AM (in response to Hemant K Chitale)Why dont you just say multiply it by 8
By the way if our bandwidth is 2.2 Mbps, it mean bit per second?
And If I am downloading a movie in my internet, and I see that the download speed is 200 kbps it means 200 kilobits per second?
How confusing Why does this bandwidth does not follow the normal Mb terminologies to avoid confusions?
So if I have 200Mb size of data to be downloaded, and I have 1Mbps bandwith, its speed is not 200 seconds to transfer? but 200Mb is equal to 1600Mbytes? so the speed in seconds is 1600?
Thanks