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#11
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File Corruption
"Klatuu" wrote in message
... In your case, you are courting disater. Keith's assertion that corruption from mutiple users using the same database are few and far between is incorrect. This is probably the most common cause of corruption. That's not what I said. There is never any valid excuse not to split a database. I wholeheartedly agree, but on the issue of sharing a FE, I have some old applications running on a network where the users do share the same FE and they have yet (in 10 years) to suffer a corruption of any kind. I would never set up an application like that now but back then I was rather inexperienced with Access - I now would not take the risk and do provide each user with their own copy (and recommend the same to others). I stand by my original statement regarding corruption arising from shared FEs. Regards, Keith. |
#12
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File Corruption
Thanks,
I don't think I will have the option to put the front end on the user's PC. No one in the 3 institutions have access to their PC's hard drives. The "My Documents" is actually a spot on a network drive called the H drive for that individual. The C drive is locked down, we can't even get into control panel to change screen display settings, a call the to help desk is required for that and one of the help desk people remote controls to do this type of thing. Heck, I can't even make a shortcut on my desktop, I use a portal desktop to access applications. No applications other than the approved applications are installed on any Networked PC. I have put in a project request to see what my options are. As for HIPPA, no patient records are on here but I think it's secure enough for that anyway, I have included that question in my project request in case we need to keep patient names for outcomes etc....These records are demographics on employees, inservice tracking, inservice sign in sheets, pager numbers, work load tracking etc...nothing really sensitive or secret. If my answer is absolutely not for putting an app to the C drive, would it help at all to make 10 copies of the front end on the shared drive and call them Steve's Employee, Lindas Employee, etc and have the user only use their own or must it be located on the computer's hard drive? Linda "Klatuu" wrote in message ... In your case, you are courting disater. Keith's assertion that corruption from mutiple users using the same database are few and far between is incorrect. This is probably the most common cause of corruption. There is never any valid excuse not to split a database. The first issue you have is maintaing modifications and fixes. Without splitting the database, this becomes more difficult. The second, particularly where you have multiple users in multiple locations, is performance. If you are running a shared unsplit database or a single shared copy of a front end on a network, you are doubling network traffic. The only proper installation of a multiuser Access application is to have a shared backend that contains data only and only data and nothing but data (notice the empahsis) in a shared network folder and a copy of the front end on each user's computer. As to distribution. Here is a link to a site for an front end updater. It is not the only one availabe. If you do some searching, you will find others, or if you are proficient in VBA, you can write your own. The basic concept of a front end updater is that in the backend database you have a file that contains the current verison number of the front end. It can be in an application information or configuration file you already have or you can create one. If you are using the technique to improve performance of keeping a hidden form open at all times with a persistent connection to a table in your back end, you can put it there. When you have a new version of the front end available for the users, put it in a folder identified for this purpose and update the front end table with the new version number. Update the version number in the back end. Then in the front end, you have a table that contains the current version of the front end mdb. In the Load event of the form you have identified in Startup, compare the version numbers in the back end and the front end. If the front end version is not the current version, open a special mdb that does nothing more than close your front end and rename it, then copies the new front end version from the specified locaton and opens it. That is the simplistic description of how to do it. The point is, there is no valid reason to use a shared mdb under any circumstance. Here is the link: http://www.granite.ab.ca/access/autofe.htm "LMB" wrote: Ed, I just want to jump in here in regards to a split database. I don't think I have the option to have a Front End because there are too many PCs to install it on, the users want to access the database on the network from any PC on any floor of our hospital and from 4 different facilities. Is what helps having only 1 person accessing the front end at a time or having the database split? I could put the front end in a folder on our N drive and put the back end in another folder on that drive. I have an idea this wouldn't be any better but I thought I would ask. Thanks, Linda "Ed Warren" wrote in message ... Do you have your database split? A backend with just the data tables and a front end with the forms,queries, reports, code etc. using linked tables to the backend. After you do that you can give each user their own 'frontend' and share the backend. This should reduce, eliminate the corruption problems you are seeing. Ed Warren. "Dj" wrote in message ... For the second time in as many days, my file has gone corrupt. The first time, I had No Locks. From a backup copy, I rebuilt my DB and changed all forms and queries to Edited Record Lock. Today, after the file went corrupt a second time, I changed to ALL RECORD Lock. There are only 2 people working in the file and I don't beleive they were both working on it at the same time today. I have 3 questions... 1. Has switching to ALL RECORDS Lock reduced my chances of getting a corruption again? 2. Is it possible for file corruption to happen from an other manner than two users editing at the same time? 3. My format is 2002. Would I decrease my chances of having another corruption happen if I convert to format 2000? Thanks! |
#13
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File Corruption
Perhaps I did overlook your statement regarding a shared fe. Since I have
not used that configuration, I can't see that it is a problem. My statement was actually meant to address a shared, unsplit mdb on a server. Where I am now, there would be at least weekly corruption. Since I corrected that issue (about a year ago), we have had no corruption. "Keith Wilby" wrote: "Klatuu" wrote in message ... In your case, you are courting disater. Keith's assertion that corruption from mutiple users using the same database are few and far between is incorrect. This is probably the most common cause of corruption. That's not what I said. There is never any valid excuse not to split a database. I wholeheartedly agree, but on the issue of sharing a FE, I have some old applications running on a network where the users do share the same FE and they have yet (in 10 years) to suffer a corruption of any kind. I would never set up an application like that now but back then I was rather inexperienced with Access - I now would not take the risk and do provide each user with their own copy (and recommend the same to others). I stand by my original statement regarding corruption arising from shared FEs. Regards, Keith. |
#14
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File Corruption
See John Vinson's post to this thread, what you are suggesting is close to
what he recommends. Ed Warren. "LMB" wrote in message ... Thanks, I don't think I will have the option to put the front end on the user's PC. No one in the 3 institutions have access to their PC's hard drives. The "My Documents" is actually a spot on a network drive called the H drive for that individual. The C drive is locked down, we can't even get into control panel to change screen display settings, a call the to help desk is required for that and one of the help desk people remote controls to do this type of thing. Heck, I can't even make a shortcut on my desktop, I use a portal desktop to access applications. No applications other than the approved applications are installed on any Networked PC. I have put in a project request to see what my options are. As for HIPPA, no patient records are on here but I think it's secure enough for that anyway, I have included that question in my project request in case we need to keep patient names for outcomes etc....These records are demographics on employees, inservice tracking, inservice sign in sheets, pager numbers, work load tracking etc...nothing really sensitive or secret. If my answer is absolutely not for putting an app to the C drive, would it help at all to make 10 copies of the front end on the shared drive and call them Steve's Employee, Lindas Employee, etc and have the user only use their own or must it be located on the computer's hard drive? Linda "Klatuu" wrote in message ... In your case, you are courting disater. Keith's assertion that corruption from mutiple users using the same database are few and far between is incorrect. This is probably the most common cause of corruption. There is never any valid excuse not to split a database. The first issue you have is maintaing modifications and fixes. Without splitting the database, this becomes more difficult. The second, particularly where you have multiple users in multiple locations, is performance. If you are running a shared unsplit database or a single shared copy of a front end on a network, you are doubling network traffic. The only proper installation of a multiuser Access application is to have a shared backend that contains data only and only data and nothing but data (notice the empahsis) in a shared network folder and a copy of the front end on each user's computer. As to distribution. Here is a link to a site for an front end updater. It is not the only one availabe. If you do some searching, you will find others, or if you are proficient in VBA, you can write your own. The basic concept of a front end updater is that in the backend database you have a file that contains the current verison number of the front end. It can be in an application information or configuration file you already have or you can create one. If you are using the technique to improve performance of keeping a hidden form open at all times with a persistent connection to a table in your back end, you can put it there. When you have a new version of the front end available for the users, put it in a folder identified for this purpose and update the front end table with the new version number. Update the version number in the back end. Then in the front end, you have a table that contains the current version of the front end mdb. In the Load event of the form you have identified in Startup, compare the version numbers in the back end and the front end. If the front end version is not the current version, open a special mdb that does nothing more than close your front end and rename it, then copies the new front end version from the specified locaton and opens it. That is the simplistic description of how to do it. The point is, there is no valid reason to use a shared mdb under any circumstance. Here is the link: http://www.granite.ab.ca/access/autofe.htm "LMB" wrote: Ed, I just want to jump in here in regards to a split database. I don't think I have the option to have a Front End because there are too many PCs to install it on, the users want to access the database on the network from any PC on any floor of our hospital and from 4 different facilities. Is what helps having only 1 person accessing the front end at a time or having the database split? I could put the front end in a folder on our N drive and put the back end in another folder on that drive. I have an idea this wouldn't be any better but I thought I would ask. Thanks, Linda "Ed Warren" wrote in message ... Do you have your database split? A backend with just the data tables and a front end with the forms,queries, reports, code etc. using linked tables to the backend. After you do that you can give each user their own 'frontend' and share the backend. This should reduce, eliminate the corruption problems you are seeing. Ed Warren. "Dj" wrote in message ... For the second time in as many days, my file has gone corrupt. The first time, I had No Locks. From a backup copy, I rebuilt my DB and changed all forms and queries to Edited Record Lock. Today, after the file went corrupt a second time, I changed to ALL RECORD Lock. There are only 2 people working in the file and I don't beleive they were both working on it at the same time today. I have 3 questions... 1. Has switching to ALL RECORDS Lock reduced my chances of getting a corruption again? 2. Is it possible for file corruption to happen from an other manner than two users editing at the same time? 3. My format is 2002. Would I decrease my chances of having another corruption happen if I convert to format 2000? Thanks! |
#15
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File Corruption
Joan Wild's website contains a concise links page:
http://www.jmwild.com/Accesssecurity.htm I know that Jack MacDonald's article has some information about setting up individual shortcuts, as do other links on that page. I expect that a virtual local hard drive (the H: drive in your case) would be the same as a physical local hard drive for purposes of distributing front ends (which can be customized as needed for certain users or groups). I am just learning about this stuff, so all I can do is point you toward information I found helpful. "LMB" wrote in message ... Thanks, I don't think I will have the option to put the front end on the user's PC. No one in the 3 institutions have access to their PC's hard drives. The "My Documents" is actually a spot on a network drive called the H drive for that individual. The C drive is locked down, we can't even get into control panel to change screen display settings, a call the to help desk is required for that and one of the help desk people remote controls to do this type of thing. Heck, I can't even make a shortcut on my desktop, I use a portal desktop to access applications. No applications other than the approved applications are installed on any Networked PC. I have put in a project request to see what my options are. As for HIPPA, no patient records are on here but I think it's secure enough for that anyway, I have included that question in my project request in case we need to keep patient names for outcomes etc....These records are demographics on employees, inservice tracking, inservice sign in sheets, pager numbers, work load tracking etc...nothing really sensitive or secret. If my answer is absolutely not for putting an app to the C drive, would it help at all to make 10 copies of the front end on the shared drive and call them Steve's Employee, Lindas Employee, etc and have the user only use their own or must it be located on the computer's hard drive? Linda "Klatuu" wrote in message ... In your case, you are courting disater. Keith's assertion that corruption from mutiple users using the same database are few and far between is incorrect. This is probably the most common cause of corruption. There is never any valid excuse not to split a database. The first issue you have is maintaing modifications and fixes. Without splitting the database, this becomes more difficult. The second, particularly where you have multiple users in multiple locations, is performance. If you are running a shared unsplit database or a single shared copy of a front end on a network, you are doubling network traffic. The only proper installation of a multiuser Access application is to have a shared backend that contains data only and only data and nothing but data (notice the empahsis) in a shared network folder and a copy of the front end on each user's computer. As to distribution. Here is a link to a site for an front end updater. It is not the only one availabe. If you do some searching, you will find others, or if you are proficient in VBA, you can write your own. The basic concept of a front end updater is that in the backend database you have a file that contains the current verison number of the front end. It can be in an application information or configuration file you already have or you can create one. If you are using the technique to improve performance of keeping a hidden form open at all times with a persistent connection to a table in your back end, you can put it there. When you have a new version of the front end available for the users, put it in a folder identified for this purpose and update the front end table with the new version number. Update the version number in the back end. Then in the front end, you have a table that contains the current version of the front end mdb. In the Load event of the form you have identified in Startup, compare the version numbers in the back end and the front end. If the front end version is not the current version, open a special mdb that does nothing more than close your front end and rename it, then copies the new front end version from the specified locaton and opens it. That is the simplistic description of how to do it. The point is, there is no valid reason to use a shared mdb under any circumstance. Here is the link: http://www.granite.ab.ca/access/autofe.htm "LMB" wrote: Ed, I just want to jump in here in regards to a split database. I don't think I have the option to have a Front End because there are too many PCs to install it on, the users want to access the database on the network from any PC on any floor of our hospital and from 4 different facilities. Is what helps having only 1 person accessing the front end at a time or having the database split? I could put the front end in a folder on our N drive and put the back end in another folder on that drive. I have an idea this wouldn't be any better but I thought I would ask. Thanks, Linda "Ed Warren" wrote in message ... Do you have your database split? A backend with just the data tables and a front end with the forms,queries, reports, code etc. using linked tables to the backend. After you do that you can give each user their own 'frontend' and share the backend. This should reduce, eliminate the corruption problems you are seeing. Ed Warren. "Dj" wrote in message ... For the second time in as many days, my file has gone corrupt. The first time, I had No Locks. From a backup copy, I rebuilt my DB and changed all forms and queries to Edited Record Lock. Today, after the file went corrupt a second time, I changed to ALL RECORD Lock. There are only 2 people working in the file and I don't beleive they were both working on it at the same time today. I have 3 questions... 1. Has switching to ALL RECORDS Lock reduced my chances of getting a corruption again? 2. Is it possible for file corruption to happen from an other manner than two users editing at the same time? 3. My format is 2002. Would I decrease my chances of having another corruption happen if I convert to format 2000? Thanks! |
#16
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File Corruption
"LMB" wrote in message
... Thanks, I don't think I will have the option to put the front end on the user's PC. No one in the 3 institutions have access to their PC's hard drives. Even C:\Temp or C:\Windows\Temp? Keith. |
#17
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File Corruption
"Klatuu" wrote in message
... Perhaps I did overlook your statement regarding a shared fe. Since I have not used that configuration, I can't see that it is a problem. My statement was actually meant to address a shared, unsplit mdb on a server. Well that's a huge no-no in my book :-) Where I am now, there would be at least weekly corruption. Since I corrected that issue (about a year ago), we have had no corruption. |
#18
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File Corruption
"Keith Wilby" wrote in message ... "LMB" wrote in message ... Thanks, I don't think I will have the option to put the front end on the user's PC. No one in the 3 institutions have access to their PC's hard drives. Even C:\Temp or C:\Windows\Temp? The C drive is completely hidden from any view. I did split my database and in a folder on our reginal network called N:CP_Mgr_ET, I have a folder called ETBackend where I put the backends of 2 of the databases. Then in the folder called a friendlier name Employee Databases, I have the front ends. I created a new database and imported all the tables for the BE, I created a new database and imported all of the objects for the FE. They are working but take much longer to load and are a tad bit slower than the complete database. Is that normal? Linda |
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