Putting Photos library on a synology NAS

Does anyone know about the feasibility with putting the photos library on a sinology NAS? I know with iPhoto there was an issue if the hard drive wasn't formatted for Mac. I've had my iPhoto library on a USB drive for years because my macbook air doesn't have enough hard drive space.

But assuming it is formatted as HFS+ Journaled... will Photos for Mac allow one to enable iCloud Photo Library? I don't see why it wouldn't, but would like to know for certain before I switch out my NAS for SAN.

Similar Messages

Library iPhoto on Synology NAS

Every time I open iPhoto when my Mac has been shot down I have too choose the place on my NAS of the library again. How can I change this?

I'm a bit new to all this, so pardon if my question is a big ignorant and perhaps already covered in more technical laguage earlier. If I understand correctly, the iPhoto Library is basically the "manager" that sorts and indexes the photo images (in my case jpg files).
Based on the earlier discussions, I understand that it is critical that the iPhoto Library live on an iOS device and not be put on the NAS. HOWEVER... why not just maintain a central photo repository on the NAS, while keeping the iPhoto Library on the local Mac devices?
My goal is to have a central photo repository that can be accessed by all the devices in my home, as well uses RAID. I tested the following scenario this evening, which seemed to work well, but am trying to understand if it will scale for my library of 30,000 images (and growing).
I created a folder on my Synology 412+ called "Photos"
I put about 100 jpg images in the "Photos" folder on the Synology NAS.
I gave access to the "Photos" folder on the NAS to two users: One called Daniel with R/W access and another called Reggy with Read-only access. (Other than Daniel, I don't want Reggy or other iPhoto users to be able to mess with the actual image locations on the NAS).
On both Daniel and Reggy's Macs, I set up iPhoto so that they would only import thumbnails for reference viewing, but the actual image files remain on the NAS. (Setup: iPhoto > Preferences > Advanced > then un-click "Copy items to Photo Library")
Here is what happened: From both Reggie and Daniel's Macs, I was able to view images using the local iPhoto Library. Furthermore, I could see all the original photo meta data, make edits to photos and save edits in the local iPhoto Library (without affecting the source image), as well as export full-version photos to the local Macs.
Seems to work great!
Am I missing something? Is this susceptible to data loss? Will this scale for my 30,000+ photos?

Following error message 'The item "iPhoto Library" can't be moved because "10.0.1.3" can't be modified' pops up, when I'm trying to copy my iPhoto library to my Synology NAS. Any thoughts what I need to do in order to succeed?

Following error message 'The item “iPhoto Library” can’t be moved because “10.0.1.3” can’t be modified' pops up, when I'm trying to copy my iPhoto library to my Synology NAS. Any thoughts what I need to do in order to succeed?

Would you rather recomment me to change to another programme like to iphoto to store and work with my photos?
I would use the NAS for documents and other data that do not need a library with database files inside. For iPhoto a small portable drive that you can plug in directly would be perfect; you can get one for 79$ http://mac-portable-hard-drive-review.toptenreviews.com/western-digital-review.h tml
Before you try to copy your iPhoto library anywhere, make sure it does not have any inconsistencies, that could prevent copying. Run a rebuild, using the First Aid tools. See this post by Old Toad on how to do it: Re: iPhoto version 8.1.2
The item “iPhoto Library” can’t be moved because “10.0.1.3”
That error message is very typical for copying between incompatible file systems. I get this error message usually when I try to move iPhoto libraries or Aperture libraries to drives with MS Dos (FAT) or unix formatting, or when some of the image files inside the library contain ethnic characters (Umlaute), have very long file names, or the filenames contain other special characters.
Do you have any other large data sets that you could try to move to your NAS instead of your iPhoto library? Movies, Music? Then move these first to have enough working space, when you try to move the iPhoto library. If you are running out of space, it will be difficult for the OS to move large amounts of data at once. That will need working space.

How do i put 'photo library' and photo folders onto my pc?

A while ago I had over 6000 photos in camera, mostly screen shots. So i imported them and sorted them out into photos taken by the camera and screen shots, put them into different folders then put them onto my phone. So i have Camera Roll & Photo Stream, Photo Library (all my foldered photos combined) Folder 1 and Folder 2. Folder 1,2 and photo library cannot be deleted.
I want to delete some pictures and videos from the folders but i can't. My computer got wiped and all those photos are gone. How do i put those pictures back onto my computer? Importing only works for camera roll and when i go into tab photos and press sync, i think it deletes them because the GB decreases dramatically. How do i put them onto my computer and delete the ones i want?

Apple does. heh software is called Time Machine. But you have to turn it on. To give reasonable protection, you need a separate disk to store the Time Machine data, otherwise, a disk failure takes out the back up data as well.
Personally, I am a bit paranoid about back up and use a three tier strategy. I use a Mac Pro with four internal drives. One is dedicated to be a Time Machine target. That backs up changed files automatically, but it is still in the same machine. I also have a Drobo FS for network storage. I back up user data to that weekly. And then I use USB drives for monthly off-site storage.

Synology NAS and iTunes

Hey everybody,
I know there's a lot written about this already, but it's pretty overwhelming and hard to find the answer.
I would like to have a music library on my Synology NAS that is synced with a local copy on my MBP. Why? I would like to have access to my library on the go even in the absence of an internet connection.
BUT, I would also like my family to have access to all the music at home while I'm away. I'd also like a Sonos system to play our library without my MBP needing to be on.
Is this possible? How would I do this? Can I have a local library that is always in sync with one on the NAS?
So confusing!
I really appreciate any help you can offer.
James

I have the same problem.
Finder sees my Synology NAS, but iTunes cannot seem to access the music. The NAS shows up in the sidebar, but I just keep getting the spinning wheel (or whatever it's called).
Can anyone suggest a fix?
I should note that I have no issues with accessing the NAS through Finder - so it looks to be an iTunes issue.

Running off NAS cannot use iCloud Photo Library

After re-loading 32000 (190gb) photos into a Clean new library running off my NAS, i decide to turn on iCloud
photo sharing.
I then get this awesome message
iCloud for Photo Library is only available on Mac OS Standard and Mac OS Extended formatted volumes.
What the !
Why would Apple care what format the HDD is where my Library is located ?
I don't have enough space on my internal SSD and it was not very safe running it off
a USB HDD
I'm running this off a Synology NAS i really hope they fix this.

Have a look at this Help page:
System Library Overview
Among other, it says:
By default, your System Photo Library is stored in the Pictures folder on your Mac, but you can move it to another location on your Mac or store it on an external storage device. However, to use iCloud services, the external storage device must be formatted using Mac OS Extended (Journaled) format, also known as HFS+.

Moving from folder-organized photo library on networked NAS to iPhoto...

Hello,
This is a fairly broad question, I know, but I've been researching for almost a full week and still at a loss as to what to do, so I thought some of the kind souls on here might be able to cut thru the forest of info out there to help me.
I vetoed iPhoto long ago but am now interested in trying it out & testing it against Picasa. However, I have a fairly large photo library that I keep on NAS, and definitely want to keep it there. Basically the research I've been doing has scared me, with all the horror stories about mixed libraries and the dangers of referenced libraries (which is what I was thinking would probably be the way to go), so now I'm a bit frozen.
My photos are currently folder-organized, mostly by date, but the level above date is by major categories (such as child's name, etc). I realize the date organization becomes redundant if I migrated to iPhoto, and even the categories seem redundant too if I can tag them all instead, etc.
The Picasa part was pretty easy, since I can just point it to the externally stored library and it does the rest, not moving anything. That part of Picasa is brilliant and makes a strong argument for going that route. My big hangup with it is the lack of nested collections - particularly in the web environment. The organizational aspects of Picasa seem a bit lackluster - and iPhoto sounds to be pretty good at that.
But with iPhoto, I'm having trouble deciding how to structure things and get started. I've read up on moving an existing iPhoto library to an external drive, but my impression is that to achieve what I'm trying to, I would need to import the entire library into local iPhoto library FIRST, then go backwards and migrate that iPhoto libary back onto NAS - which would then be a duplicate of the entire library since I'd be leaving the original intact to continue using with Picasa. Is that indeed the way to do it? I'm a little worried about ending up with an undifferentiated mass of 50+ Gigs of pics in iPhoto that i'd then need to go thru individually to tag (a monstrous task), as opposed to, say, having the names of folders turned into tags on all the pics within those folders (wishful thinking?).
To complete the picture of my situation for whoever may be kind enough to read all this, we have an iMac & a MBP, and would love to be able to share the NAS library on our respective iPhotos, and be able to keep "sync'd" up to what the other has done. From reading around it seems this is a little trickier, and the stuff I've been seeing about speed issues with WiFi-connected NAS libraries is not making me any more comfortable.
I was somehow able to rig just this situation up for iTunes (the library for which is shared & kept on NAS), which works pretty good (although I'm now concerned that that is also a 'referenced library' and liable to the same horror stories and cautions as external referenced libraries for iPhoto - is it the same? - so far so good...).
I've seen Terence Devlin mention a few times about using 'external managed libraries' instead of referenced libraries, but I'm not sure how to do that. The other vague conclusion I've come to from reading around is that I should probably use iPhoto Library Manager to achieve my goals here, and although I'm aware of what IPLM does, I'm not totally clear about how I would use it most effectively in my situation.
Whew - sorry for such a long rambling 'question'! This has probably been addressed elsewhere in the boards, but I've been reading for hours and can only get glimpses into a possible strategy for my situation - I thought just asking might nip it in the bud.
THANKS!

Welcome to the Apple Discussions.
A long question with, I'm afraid, a short answer.
a fairly large photo library that I keep on NAS, and definitely want to keep it there.
Stick with what you have. iPhoto needs to have the Library sitting on disk formatted Mac OS Extended (Journaled). Users with the Library sitting on disks otherwise formatted regularly report issues including, but not limited to, importing, saving edits and sharing the photos. That pretty much rules out having a Managed Library on that NAS.
In some more detail:
My photos are currently folder-organized, mostly by date, but the level above date is by major categories (such as child's name, etc). I realize the date organization becomes redundant if I migrated to iPhoto, and even the categories seem redundant too if I can tag them all instead, etc.
Here's a fast way to tag them:
Start at the bottom of your Folder hierarchy and drag a folder of images to the Album Heading in the iPhoto Window. iPhoto will import the pics and make an Album of the same name as the Folder. Now: Want to tag all those pics with the same keyword: Select all (Command - a) and apply the keyword.
You can work through your images quite fast in this way.
Alternatively, use an app like Keyword Manager which has Nested Tags as a feature. So, for instance, you can set a hierarchy: John is your Son so tagging 'John' will also add a 'Family' tag and so on. In my case I have tags like 'Seattle' that add 'Washington State' 'U.S' and 'Travel' to the pics. WIth auto completion all I have to type is Sea...
but my impression is that to achieve what I'm trying to, I would need to import the entire library into local iPhoto library FIRST, then go backwards and migrate that iPhoto libary back onto NAS
No, all you need to di is start a Library, then move it to an appropriately formatted disk. You don't need to complete the Library first.
we have an iMac & a MBP, and would love to be able to share the NAS library on our respective iPhotos, and be able to keep "sync'd" up to what the other has done.
Again, noting that the NAS is not the way to go here, you can simply enable iPhoto Sharing or use the same Library with both machines - very easy.
I know that these a pretty short answers, and by all means post back if we can be more helpful.
Regards
TD

After upgrading my 3gs to ios5, I get 2 copies of pictures synced from my computer, 1 in the Photo Library and another in a library with the same name as the folder I put the pictures in to put on the phone. Any ideas why?

When syncing pictures from my computer to my I-Phone I get 2 copies of the pictures, 1 in the Photo Library and another in a library with the same name as the folder I put pictures in to put on the phone. This started after I upgraded to ios5. I have tried re-installing I-Tunes. I have not reset the phone. My main concern is the amount of memory pictures take up on the phone. It's not a problem now but could be in the future. Any Ideas on why this happening?

It has always been this way. it was never different. This is how the iphone handles photos - always has.
There are NOT two copies, There are simply two ways to access the very same photos. All synced photos will ALWAYS be under Photo Library ( you can look at all photos at once this way or do a slideshow of all photos). Those very same photos can also be accessed from the individual folders so you can show or slideshow just that folder.
Just as a book can be in the library and in the fiction section, there is only one book/photo.

Edit photo's on Synology NAS via Photoshop Touch on iPAd

Hi Adobe,
Can I edit photo's on Synology NAS via Photoshop Touch on iPAd>?
I have many many photos on the NAS and would like to remove unneeded photos and edit the good ones.
I don't want to use laptop or PC, just the iPad.
gr-JW

Hallo Guido,
Ich glaube, Sie verwechseln mich für jemand anders!
gr-JW

I have an external hard drive set up as a Time Machine backup on my IMac. I want to add a second external hard drive and put my Aperture Photo Library on it. Is there a way to have the photos on this second hard drive automatically back up to the Time Mac

I have an IMac with an external hard drive set up as a Time Machine for automatic backups. I want to add a second external hard drive and load my Aperture Photo Library on to it so that the library can be shared by both me and my wife. Is there a way to automatically backup the photo library that will be on the second hard drive to the Time Machine hard drive?

Open System Preference > Time Machine
Click Options....
Ckick on external disk in list and hit the - button below the list to remove from the Exclusion list
Allan

I would like to move my photos in iPhoto to my NAS?

I would like to move my photos in iPhoto to my NAS.
Some state simply drag and drop it then point iPhoto to the new Location
quit iPhoto and drag the iPhoto library intact as a single entity to the external drive - depress the option key and launch iPhoto using the "select library" option to point to the new location on the external drive
Some say it isn't possible.
Unless the NAS is formatted Mac OS extended (journaled) you will not be able to run the iPhoto library on it
I am not particularly fussed about other users seeing it, I just want it off my iMac? I am using iphoto 9.5.1. its a synology DS213J NAS.
thanks,
ooops think i am in the wrong section, if someone can move it then great. apologies.

for anyone else reading this, this is what I was told in the other forum.
iPhoto is problematic with referenced original files, because iphoto has no tools to recover from broken references, but Aperture has been designed to handle referenced images and libraries distributed across several drives well and has tools to fix broken references.
But both, iPhoto and Aperture, are not network databases.
Apple says: Use locally mounted Mac OS X Extended volumes for your Aperture library
Putting your originals on a network storage will make Aperture slower, and you are risking library corruption by transmission errors. The safest and option, and the solution with the quickest access to your original files will be a directly connected drive.

What is the intended way to organize a big photo library?

What is a good workflow using iphoto and or aperture to work with a big photo library involving NAS? Local hard drives are becoming overly taxed with the amount of data from high res pictures. I have to mention I am just an average photo amateur not a Pro. The possibilty of sharing the library between users in the family would be great too.

One can't use an iPhoto or Aperture library on a NAS. The NAS doesn't support the file system used in those libraries and will corrupt the library.
To handle larger libraries or share usage of a library between users in the family put the library on an external hard drive formatted OS X Extended (journaled) with ownership set to be ignored,
connect the drive to a desktop or host Mac and run the library from there and let the other users either connect from their Macs to the host to access the EHD or access it from their account on the host Mac.
The bottom line: NAS is verbotten, i.e. a big NO NO!
OT

Time Machine vs. CCC, and Lightroom on Synology NAS?

For some reason, I decided that it was the perfect time to streamline my backups and photo importing/archiving two weeks before I have to be in Cancun to shoot a destination wedding... And this has proven to me that I'm a lot less literate than I thought I was. I couldn't find an obvious category for this, but it involves Time Machine which has something to do with Time Capsules/remote backups, so here goes. Let me know if I should post it somewhere else.
Here's what's going on:
I just bought a Synology DS214+ (running Synology's Linux OS Diskstation Manager (DSM) 5.0) and one 3TB drive. The immediate game plan is to import photos through Lightroom 5, keeping the LR catalog on my computer's SSD and filing the master images on the NAS drive. I might also move my iTunes library and a bunch of old video footage over to the NAS since both are taking up a lot of space on the SSD and I don't really need SSD performance for either. I would also back up my computer(s) to the NAS drive, and then back up the NAS once or twice a week to an external HDD that I keep offsite. Once the 3TB drive gets close to full and storage prices drop as they tend to do, I'd add a larger drive in JBOD, keep my photos/music/movies on the 3TB for an extra disc of redundancy, back up both that and my computer(s) to the larger drive, and back up the larger drive to the offsite external HDD.
(In the nearer future, I'd also like to get the NAS set up so that I can remotely access at least the photo library, if not everything, with my iPhone and Macbook Pro. In the farther future, I'd like to use the NAS to host my [currently nonexistent] website and mail server. Finally, of lowest priority would be hosting a Minecraft server on the NAS; I'm already financing one for my kid brothers as an ongoing Christmas gift, so for them to have a server while keeping that money in pocket would be nice. I'm not begging for step-by-step instructions on all of this right now, but if you happen to know of any good links they'd be appreciated; and I want to make sure I configure the NAS now so that I can add all this in later.)
That's a lot of stuff for one piece of equipment... Anyone who has this hardware, is familiar with DSM, or has done any of this stuff: am I out of my mind or is this doable?
Here are the current questions:
Up until now I've been using Time Machine on a directly attached external drive, but this "bootable copy" that Carbon Copy Cloner (CCC) makes is intriguing. However- that requires a locally mounted drive formatted in HFS+, and since my NAS is Linux based as far as I understand any drive I install will be formatted to EXT4. I can set up an iSCSI LUN through DSM which would allow me to create the illusion of a locally attached drive, but could I format this 'phantom drive' to HFS+ so it will support OSX system files? Even if yes, would I be able to boot off it - or does the iSCSI not kick in until after OSX boots anyway, effectively rendering it useless as a boot drive? Not a huge deal since I can boot off an SD card, but it would be good to know since that would make things slightly more convenient.
If I can’t boot off the iSCSI 'phantom drive', then I should just be able to use Time Machine for backups to the NAS since it looks like DSM supports that. I thought I’d still need CCC to back up the NAS to the offsite HDD, but it looks like DSM can do that too. Would I have any other reason to buy CCC, then? Would DSM be able to routinely backup the library drive to the main backup drive once I have both installed in the NAS?
How would I set up the NAS so that it always has the same network IP when rebooting? I don't plan for this to be a frequent event, but it would be a minor inconvenience to have to go through Synology's disc assistant and change my browser's bookmark every time there's a power outage, which I’d like to avoid if possible. (From the basic research I've done in that area so far it also seems like that would be more important for remote access and using the NAS as a web host or mail server.)
I'll want to get my mac to connect to the NAS automatically upon booting or waking, but it looks like there are adequate tutorials for doing that with automator and/or terminal. Any experiences with this being fairly easy, or tips/tricks if it isn't?
I know I couldn't export them, but does anyone happen to know if I could still edit and/or display the sidecar images in my Lighroom 5 catalog while I was disconnected from the NAS containing the original files? I guess that isn’t a deal breaker, but it’d be good to know if I can or if there’s any sort of additional setup to facilitate this.
Currently the NAS is set up as "basic" since it only has one drive. When I add the second, I can convert the NAS to JBOD without erasing the current drive, right?
Should I do any sort of partitioning or formatting right now to make sure that the NAS is web hosting friendly, and that those accessing the future website or Minecraft server can’t get into or corrupt my personal files and backups?
That’s all my tired mind remembers for right now; I’ll add more questions if/when they come up.
Thanks in advance for the help!

That's the problem with using a 3d-party NAS with Time Machine; it has it's own software that's supposed to interact with OSX, and when something goes wrong, it can be very hard to sort out just what and where the problem is.
First, make sure that model is fully compatible with Time Machine on Lion (some are, some aren't), and install any software/firmware updates Synology has for it.
Second, make sure the names (of all odd things) of your Mac and network aren't too long and don't contain any special characters, per #C9 in Time Machine - Troubleshooting.
Third, make sure you're following Synology's instructions exactly.

Aperture and Synology NAS 212j

Hi everyone. I just bought a Synology NAS (2x2tb HD) which I plan to use with all my media (music-photos-videos) so I can access it through a mac mini server, connected to my living room tv. Concerning my photos, I have them all in a Macbook Pro (400Gb library) working with aperture 3, all managed files stored within the Aperture Library on the MacBook.
What I was planning to do is, while keeping my macbook as it is, (with all photos and aperture library stored in it, as a back-up), create a new aperture library on my mac mini and point it to the masters file located at the NAS.
I already placed a copy of all my masters in the NAS and I can actually access all these pictures once the NAS DiskStation is mounted on my wired network.
I then tried to copy all the folders and files inside the aperture library icon (except the masters), and paste them on the Mac Mini's Photo folder so that I could launch Aperture (option click) and chose to open that library.
The problem is that I get an error message: "There was an error opening the database for the library '/volume/photo/vacationeurope2012.aplibrary".
The solution I am looking for is how to keep my library and masters on my macbook and, at the same time, create a "copy" of that same library, where the library database would be stored in the mac mini and all the files (masters+projects) on the NAS.
I am now trying something new, which is to transfer the copy I have on a external HD of the whole 400Gb Aperture library and place it the MacMini. I'd then open aperture and make it relocate the masters, pointing them to the Synology DiskStation.
Any other ideas would be greatly apreciated!!
Thanks
Gustavo

Hi Gustavo,
Be careful with what you place on your NAS because it is not HFS+ formated, and that means that some of the information that Mac OSx needs can't be stored on other file systems.
I currently own a QNAP NAS and I also wanted to move my iPhoto, iTunes, etc Libraries onto the NAS, but before I did so I looked it up a little bit and it seems to not be that good idea unless you purchase, of course, yet another Apple product: Time Capsule or Airport Extreme.
On the other hand, I would also like to stream videos to iPads and iPhones in my household. For that, you really need a powerful CPU. State-of-Art 2-bay NASes feature Atom processors and they choke on large files...
I may start looking into migrating my current setup and go for a Mac Mini (with enough horsepower for video transcoding) with a Time Capsule attached to it.
Man, Apple works flawlessly and I do love them, but they are sooo incompatible with every single other thing out there...

Keep local iPhoto Library in sync over NAS

Hi every one
Here's my usecase: I want use ONE iPhoto Library with 3 Mac's and 2 Useraccounts. Why ONE library? Because i want work on Albums etc. on my stationary iMac in Room1, and finish it on my MacBook pro while sitting on my sofa :-) It also can be, that my wife will work on the same Album too. Of course not at the same time, but i don't want to tell her if the Library is available at the moment, or if I've already opended iPhoto on another Mac. It has to be automatically "locked" if someone is using it. Easy, just put the whole thing on a NAS and you got this effect automatically. Correct, but the speed isn't really nice. Why buying an i7 iMac with Fusion drive and using a NAS as source while working on photos...? Got it? (sorry for my poor english, i'm swiss but doing my best :-) )
Here's my solution approach I would like to have: (sorry a little confuse...)
My i7 iMac has a local iPhoto library. A "sync software" keeps the iPhoto library in sync with a mirrored version on a NAS, (wich can be a Timecapsule as well as any other NAS). when I open iPhoto on my iMac, it has to lock the whole iPhoto library on my NAS as well, so my wife can't open the library on my NAS while I'm using it local on my iMac. After i close my iPhoto on my iMac, the mirrored Library is available on my NAS where i can use it with my MacBook Pro directly from my NAS. The "sync software" has to lock the file in the other direction, so i can't open my local Library on my iMac at this time. When i close iPhoto on my macBook Pro it will be unlocked and the sync software on my iMac will update my local copy automatically the next time that i start my iMac and (surprise surprise) my local version is up to date!
You see my point? The clou is to lock the library on another place while using it's mirrored version. That helps preventing any corrupt iPhoto Librarys becaus of two user at the same time and you don't have any performance inconvenience.
Advanced version would be to habe many Mac's with local iPhoto librarys. It would still be the same: If it's not possible to use a Library at the same time, you wan't have any problemes with de database... right? There would be one problem: If you work on a local iPhoto library while you're not connected with your nas, you wan't have informations about the "lock" status... but that's another story-
I tried "synk pro" which keeps folders and documents "realtime" in sync. But it works really bad with NAS and my problem with the "lock" is still there.
Folks: Any ideas to share with me? I just wan't to have a SAVE iPhoto library to work on it with my wife an our 3 Mac's ;-)
Many thanks
Roman

iPhoto needs to have the Library sitting on disk formatted Mac OS Extended (Journaled). Users with the Library sitting on disks otherwise formatted regularly report issues including, but not limited to, importing, saving edits and sharing the photos.
This is particularly the case now that iPhoto uses the same library as Aperture:
http://support.apple.com/kb/TS3252
Note:
it is strongly recommended that the Aperture library be stored on a locally mounted hard drive. Storing the Aperture library on a network share can also lead to poor performance, data corruption, or data loss.
What do you mean by "Sync".
The general term means when two Libraries (A and B) are compared and files in Library A are copied to Library B, while files in Library B are also copied to Library A so that both Libraries are identical.
This is bi-directional copying and you cannot do this automatically with iPhoto. No Syncing software is capable of parsing the iPhoto Library in this manner. One or both of your Libraries will be damaged if you try this.
You can have uni-directional copying - files in Library A are copied to Library B - this is essentially backing up. Obviously you can also copy from Library B to Library A.
The nearest you can get to syncing is to use iPhoto Library Manager to move files/Albums/Events plus associated metadata between Libraries. This process cannot be automated.

Putting Photos library on a synology NAS

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