oh!!!! now I understand it......hmm....
Just one last thing
Here are 3 cases. See if my conclusion in each case is correct especially the last one?
Let's suppose a month is of 3 days instead of 30.
Case 1: Client goes beyond his Summary Disk Space allocation, Disk Quota remains the same, Mail and database quota doesn't matter
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Here is the default allocation
Summary Disk Space: 200 MB
Disk Quota: 200 MB
Mail Quota: 10 MB
Database Quota: 10 MB
Every 24 hours HSphere takes reading which is as follows
Day 1
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Actual Disk Quota usage: 100 MB
Actual Mail Quota usage: 100 MB
Actual Database Quota usage: 7 MB
Summary Disk Space for this day: 207 MB
Day 2
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Actual Disk Quota usage: 150 MB
Actual Mail Quota usage: 75 MB
Actual Database Quota usage: 12 MB
Summary Disk Space for this day: 237 MB
Day 3
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Actual Disk Quota usage: 95 MB
Actual Mail Quota usage: 10 MB
Actual Database Quota usage: 25 MB
Summary Disk Space for this day: 130 MB
Result: Summary Disk Space usage for month: (207 + 237 + 130) / 3 = 191 MB
Conclusion: At the end of the month client will not be billed extra because neither he went beyond the Summary Disk Space nor Disk Quota, right?
Case 2: Client doesn't go beyond his Summary Disk Space allocation, goes beyond Disk Quota, Mail and database quota doesn't matter
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Here is the default allocation
Summary Disk Space: 200 MB
Disk Quota: 200 MB
Mail Quota: 10 MB
Database Quota: 10 MB
Every 24 hours HSphere takes reading which is as follows
Day 1
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Client increases his Disk Quota from 200 MB to 250 MB.
Actual Disk Quota usage: 210 MB
Actual Mail Quota usage: 20 MB
Actual Database Quota usage: 5 MB
Summary Disk Space for this day: 235 MB
Day 2
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Client decreases his Disk Quota from 250 MB to 200 MB.
Actual Disk Quota usage: 75 MB
Actual Mail Quota usage: 10 MB
Actual Database Quota usage: 12 MB
Summary Disk Space for this day: 97 MB
Day 3
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Actual Disk Quota usage: 103 MB
Actual Mail Quota usage: 11 MB
Actual Database Quota usage: 26 MB
Summary Disk Space for this day: 140 MB
Result: Summary Disk Space usage for month: (235 + 97 + 140) / 3 = 157 MB
Conclusion: At the end of the month client will be billed extra because although he didn't go beyond the Summary Disk Space but he did went beyond his Disk Quota, right?
Case 3: Client goes beyond his Summary Disk Space allocation, goes beyond Disk Quota, Mail and database quota doesn't matter
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Here is the default allocation
Summary Disk Space: 200 MB
Disk Quota: 200 MB
Mail Quota: 10 MB
Database Quota: 10 MB
Every 24 hours HSphere takes reading which is as follows
Day 1
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Client increases his Disk Quota from 200 MB to 250 MB.
Actual Disk Quota usage: 210 MB
Actual Mail Quota usage: 20 MB
Actual Database Quota usage: 5 MB
Summary Disk Space for this day: 235 MB
Day 2
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Client decreases his Disk Quota from 250 MB to 200 MB.
Actual Disk Quota usage: 105 MB
Actual Mail Quota usage: 110 MB
Actual Database Quota usage: 12 MB
Summary Disk Space for this day: 227 MB
Day 3
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Actual Disk Quota usage: 103 MB
Actual Mail Quota usage: 25 MB
Actual Database Quota usage: 26 MB
Summary Disk Space for this day: 154 MB
Result: Summary Disk Space usage for month: (235 + 227 + 154) / 3 = 205 MB
Conclusion: At the end of the month client will be billed extra for both summary disk space and disk quota because not only he went beyond the Summary Disk Space but he also went beyond his Disk Quota, right?
It means he will be billed for 5(summary disk space) + 50 (disk quota) MB, right?