What is in the weekly/monthly backups?
I can understand the hourly backups, but what is in the weekly/monthly backups? Is it the most recent of the hourly/weekly? If I restore a file that's a month old, what is the effective date of the data?
Does this question make sense?
JD
Consider that the hourly backups are effectively a complete copy of your system for each hour. The same is true of the dailies and weeklies. These are effectively complete copies. When it kills the hourlies and keeps the dailies, etc., it's giving you the effective complete system as of the end of that date.
What goes on under the hood is another matter, but for practical purposes, that's what its doing. Behind the scenes, it's avoiding making multiple copies of the same unchanged file, but for users, you don't need to know the tricks that are used to make it both complete at each backup and not redundant.
If you recover data from a backup of 4 weeks ago, you are looking at your system as it was at that moment in time, the end of the day on the effective date.
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Manually Deleting Previous Day/Week/Month Backups
Hi,
I use an external drive solely for time machine; however, I have a need to transfer about 20 GBs and want to use the external for such. Time machine currently maxes out the 200 GB hard drive with all its previous (years worth) of backups.
1) Wondering if I could manually browse (via finder) the time machine drive and delete my previous (oldest) backups to free up some space... Is this possible or will it ruin my backups?
2) Similarly, in a similar manner what if I wanted to retain only the latest backup of my files, and extinguish ALL the previous ones--to have a clean slate (I don't need any previous files).
I notice when I browse (via finder) I can see all the incremental time periods of backups. Is it as easy as deleting all of these folders except for the "latest" one? I realize the point of time machine is it references files that have not changed, so I'm weary that all my sub folder dates link/reference others, and in destroying one could ruin all of them...
Thanks,
TM{quote:title=T.M. wrote:}{quote
1) Wondering if I could manually browse (via finder) the time machine drive and delete my previous (oldest) backups to free up some space... Is this possible or will it ruin my backups?
Don't use Finder to alter TM backups. You are asking for trouble. You can open the TM interface and try to delete backups from there.
2) Similarly, in a similar manner what if I wanted to retain only the latest backup of my files, and extinguish ALL the previous ones--to have a clean slate (I don't need any previous files).
In that case, erase your backup drive and start over. Seriously. That will clear out your backup drive the best.
I notice when I browse (via finder) I can see all the incremental time periods of backups. Is it as easy as deleting all of these folders except for the "latest" one? I realize the point of time machine is it references files that have not changed, so I'm weary that all my sub folder dates link/reference others, and in destroying one could ruin all of them...
Repeat of answer to question one. Don't mess with TM via Finder. Use the TM interface. Open Finder and click the TM icon on the Dock to open the TM interface. -
What happened to the future months / years tab with iOS 7?
My old calendar had a nice feature at the bottom of the calendar allowng me to select future months and "next year".
It's gone with the iOs & update - this is not progress as it now takes longer to find future months by swiping all the way throough each month in turn.
Someone needs to get a grip and not throw out everything just because they can...If you are on, say, the daily view page, then tap the month in the upper left to get a month view, then tap the year in upper left to get a year view. In year view, swipe up/down go to the year whose month you want, then tap on the month and you're on month view. Works differently but just as quickly.
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Server 2012 separate monthly backups to network share
Hi,
We have a NAS on our domain (network share) that we that we would like to do a backup to on the 1st of each month. We do not want the previous months backup to be erased. So we end up with 12 backups(jan, feb, ....,dec). This backup will be taken
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Is there a script we can schedule can accomplish this? Any help will be greatly appreciated.
Thank you,
Ericebsea, I understand where you're coming from, but I agree with jrv completely.
As you've presented the problem, it will be very hard for you to find help here, since you're asking for free help to do something that will probably require quite a bit of research and testing on our side for something that normally most of us here would
charge for (as consultants).
Instead, may I suggest that you concentrate on small steps of what you're trying to achieve, do a lot of testing on your side and ask very concrete questions when you come across a problem?
I.e.,
Is it possible to script backup to \\nas-2015\monthly\01 for jan, \\nas-2015\monthly\02 for feb,
etc?
That's a concrete question, the answer is yes.
If you want to programmatically modify the folder something goes to depending on the month of the year (or any other time variable), in PowerShell you can use the Get-Date CmdLet.
To look at all of the properties and methods that the object it returns has, just do:
Get-Date | Get-Member
This will show you that there is a Month property of type Integer (among other things), so doing:
(Get-Date).Month
Will return the number of the current month. So 1, 2, ... 12. However, this will not have a leading zero for months with a single digit, which is useless for what you're after.
While we could do silly things like string manipulation (append a zero to the left side of the string and then return only the two characters from the right, as was done in VBScript), this is PowerShell and there is no need for that nonsense anymore.
Instead, looking at the documentation (https://technet.microsoft.com/en-us/library/hh849887.aspx) shows us that Get-Date has a -Format parameter and delving a bit deeper onto how to
use it (https://technet.microsoft.com/en-us/library/ee692801.aspx) tells us it can do exactly what we're after. In the case of returning the month with a leading 0 for single digit months
we simply do:
Get-Date -Format MM
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Fausto -
Oracle returning incorrect day of the week
Hi there,
I have a table named Performance, which includes a date field named PDATE, some other attributes such as title, etc, and a field named WEEKDAY, which includes the numerical value for the day of the week. Here is an example:
PER#
P#
THEATRE#
WEEKDAY
PDATE
PHOUR
PMINUTE
COMMENTS
1
1
1
1
02-MAR-10
19
30
Normal evening time
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1
1
2
03-MAR-10
19
30
Normal evening time
58
6
6
3
04-MAR-10
19
30
Normal evening time
5
1
1
4
05-MAR-10
19
30
Normal evening time
I went to verify the day of the week in a calendar (in fact I checked more than one) and I noticed that the Weekday value seems incorrect. For instance, the 2nd of March was a Tuesday so I would expect WEEKDAY to say 3 (considering Sunday to be the 1st day of the week, which is the universal norm), or perhaps 2 (considering Monday to be the 1st day of the week).
First thing that came to mind is, since the WEEKDAY is a number field which has been pre-populated, the person who populated it made a mistake.
So I went to verify this by running a query that would give me the correct day of the week by extracting it from the PDATE field:
SELECT DISTINCT pdate, EXTRACT(year from pdate) year,
to_char(to_date(pdate,'DD/MM/YYYY'),'DY') weekdaycalc, weekday
FROM ops$yyang00.Performance
ORDER BY pdate
And to my astonishment, I got the following table as a return:
PDATE
YEAR
WEEKDAYCALC
WEEKDAY
02-MAR-10
2010
SUN
1
03-MAR-10
2010
MON
2
04-MAR-10
2010
TUE
3
05-MAR-10
2010
WED
4
06-MAR-10
2010
THU
5
07-MAR-10
2010
FRI
6
08-MAR-10
2010
SAT
7
09-MAR-10
2010
SUN
1
10-MAR-10
2010
MON
2
As you can see, all of the above WEEKDAYCALC values are incorrect, and seem to match the incorrect values in WEEKDAY.
I could perhaps understand some weird WEEKDAY numbering if there is some general database setting where I could specify any day of the week to be the first day. However, I can't think of any logical explanation on why Oracle would call a Tuesday Sunday.
Could someone please advise what I mght be doing wrong? This is driving me insane!
Thank you in advance for all the help and support.
Regards,
P.Hi,
1bded5c7-e555-4306-ac86-45da83dff439 wrote:
Thanks both Frank and Solomon for the help. I am quite new to Oracle and I feel you folks went the extra mile on the explanation
Based on your explanations, I changed the formula so the date format would be processed as YY rather than YYY.
SELECT DISTINCT pdate, EXTRACT(year from pdate) year,
to_char(to_date(pdate,'DD/MM/YY'),'DY') weekdaycalc, weekday
FROM Performance
ORDER BY pdate
And I got the correct values now:
PDATE
YEAR
WEEKDAYCALC
WEEKDAY
02-MAR-10
2010
TUE
1
03-MAR-10
2010
WED
2
04-MAR-10
2010
THU
3
05-MAR-10
2010
FRI
4
06-MAR-10
2010
SAT
5
07-MAR-10
2010
SUN
6
08-MAR-10
2010
MON
7
The interesting bit here, is the original WEEKDAY field, which clearly has been created with the same mistake I did (this whole table wasn't created by me). I reckon I spotted a design bug.
Regards,
P.
No; you're still calling TO_DATE on something that is already a DATE, and you're still using an implicit conversion (only now you're using a format such that the current NLS settings don't cause you to get punished. If your DBA changes the NLS settings next week, then you will have similar errors again.)
If you want to see what day of the week pdate is, then use:
TO_CHAR (pdate, 'DY')
or, to make it NLS-independent:
TO_CHAR (pdate, 'DY', 'NLS_DATE_LANGUAGE=ENGLISH')
This is simpler than what you posted, it's more efficient and easier to debug and to maintain, and it also gets the results you want in all cases.
One more time: TO_DATE, as the name hints, converts something (a VARCHAR2, to be precise) TO a DATE. If pdate is already a DATE, then what do you need to convert? You're implicitly converting a DATE to a VARCHAR2, then explicitly converting that VARCHAR2 back to a DATE, and then calling TO_CHAR. That's 3 function calls (1 of them error prone) where only 1 is needed.
Also if you ever have to reconcile 2-digit years with 4-digit years (and, again, in this problem you don't) the correct way is to convert the 2-digit year to a 4-digit year, not vice-versa.
Calling Tuesday the 1st day of the week could make sense in a particular application. -
Days Since Jan 1, 1900. Days of the week
If I Had a long date,
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How can I figure out what day of the week it would be?If I Had a long date,
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How can I figure out what day of the week it would
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--lichu -
Function module to retrieve day of the week from a date.
Hi Experts,
i am looking for a function module to retrieve the day of the week from a specific date. For example, the date is 20070820. The day of this date is 'Monday'.
Please let me know how do i get the result i.e. 'Monday'.
thanks a lot for ur timely help.
Best regards,
AkshDATE_COMPUTE_DAY
Returns a number indicating what day of the week the date falls on. Monday is returned as a 1, Tuesday as 2, etc.
DATE_IN_FUTURE
Returns a number indicating what day of the week the date falls on. Monday is returned as a 1, Tuesday as 2, etc.
DAY_ATTRIBUTES_GET
Return useful information about a day. Will tell you the day of the week as a word (Tuesday), the day of the week (2 would be Tuedsay), whether the day is a holiday, and more
regards,
srinivas -
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I would really appreciate your help. ThanksThere's a Calendar behavior in the Text section of the
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Hello,
I am working towards determine the week number of month and make appropriate routing changes only for that specific week. I have tried using the trunc(), getdate() and weekday(). But i fail to get the week number of a month, but I believe I have managed to the week number of a year.
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