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‫نصر‬ ‫موسوی‬ ‫محمدرضا‬
‫هللا‬ ‫حبیب‬‫محمدتقی‬
MAY 2012
‫مقدمه‬
‫اهمیت‬‫و‬ ‫اطالعات‬‫د‬‫ر‬‫مو‬‫در‬ ‫مهم‬‫نکات‬‫ی‬‫گیر‬ ‫پشتیبان‬
‫معرفی‬DAS
‫ش‬‫و‬‫ر‬‫مشکالت‬DAS
‫معرفی‬NAS
‫ش‬‫و‬‫ر‬‫مشکالت‬NAS
‫معرفی‬SAN
‫شبکه‬ ‫انواع‬SAN
‫ایای‬‫ز‬‫م‬SAN
‫های‬‫تفاوت‬NAS‫و‬SAN
MAY 2012
‫دنیای‬‫ز،دنیای‬‫و‬‫امر‬‫فن‬‫ی‬‫ر‬‫آو‬‫اطالعات‬‫است‬‫و‬‫در‬‫این‬‫میان‬‫توانمندی‬‫در‬‫حفظ‬‫و‬
‫ی‬‫نگهدار‬‫و‬‫ی‬ ‫دسترس‬‫سریع‬‫به‬‫اطالعات،باعث‬‫ایش‬‫ز‬‫اف‬‫ائی‬‫ر‬‫کا‬‫می‬‫گردد‬.
‫ه‬‫ز‬‫و‬‫امر‬‫اطالعات‬‫ای‬‫ر‬‫دا‬‫ش‬‫ز‬‫ار‬‫ده‬‫و‬‫افز‬‫هستند‬‫وجزء‬‫سرمایه‬‫شرکتها‬‫محسوب‬‫می‬
‫شوند‬.‫اطالعات‬‫قابل‬‫ی‬‫خریدار‬‫شدن‬‫از‬‫ار‬‫ز‬‫با‬‫نیستند‬‫و‬‫در‬‫ت‬‫ر‬‫صو‬‫از‬‫دست‬‫دادن‬
‫آنها‬‫ر‬‫ضر‬‫یادی‬‫ز‬‫متوجه‬‫مان‬‫ز‬‫سا‬‫مربوطه‬‫می‬‫گردد‬.‫لذا‬‫هر‬‫مانی‬‫ز‬‫سا‬‫با‬‫بکارگی‬‫ی‬‫ر‬
‫ات‬‫ز‬‫تجهی‬‫مناسب،سعی‬‫در‬‫حفظ‬‫و‬‫ی‬‫نگهدار‬‫آنها‬‫د‬‫ر‬‫دا‬.
MAY 2012
‫گرفت‬ ‫نظر‬‫در‬ ‫بایست‬ ‫می‬‫اطالعات‬‫د‬‫ر‬‫مو‬‫در‬ ‫که‬‫نکاتی‬:
‫باال‬ ‫شد‬‫ر‬‫نرخ‬
‫امنیت‬
‫آن‬ ‫به‬‫سریع‬‫ی‬ ‫دسترس‬
‫بودن‬ ‫دسترس‬‫در‬
‫مدیریت‬
‫ات‬‫ز‬‫تجهی‬ ‫ابی‬‫ر‬‫خ‬‫ابر‬‫ر‬‫ب‬ ‫در‬‫حفاظت‬
MAY 2012
MAY 2012
‫هستند‬ ‫ها‬ ‫سازی‬ ‫ذخیره‬ ‫از‬ ‫حالت‬ ‫اولین‬.‫سرور‬ ‫روی‬ ‫بر‬ ‫سازی‬ ‫ذخیره‬ ‫سیستم‬ ‫حالت‬ ‫این‬ ‫در‬
‫گردد‬ ‫می‬ ‫نصب‬
‫اغلب‬ ‫هاردها‬ ‫نوع‬ ‫این‬SCSI‫ویا‬SAS‫پشتیبانی‬ ‫کلی‬ ‫حجم‬ ‫به‬ ‫محدود‬ ‫انها‬ ‫وتوسعه‬ ‫باشند‬ ‫می‬‫شده‬
‫باشد‬ ‫می‬ ‫سرور‬ ‫توسط‬.
‫سیستم‬DAS‫کا‬ ‫آن‬ ‫با‬ ‫سرور‬ ‫که‬ ‫عامل‬ ‫سیستم‬ ‫یک‬ ‫با‬ ‫میتواند‬ ‫فقط‬‫ر‬
‫کند‬ ‫کار‬ ‫میکند‬.
‫به‬ ‫نیاز‬Down Time‫دارد‬.
‫شود‬ ‫می‬ ‫ها‬ ‫سرور‬ ‫کارایی‬ ‫کاهش‬ ‫باعث‬
‫شود‬ ‫می‬ ‫انجام‬ ‫سرور‬ ‫توسط‬ ‫گیری‬ ‫پشتیبان‬ ‫عملیات‬.
‫بستر‬ ‫در‬ ‫شدید‬ ‫ترافیک‬ ‫وجود‬LAN‫پشتیبان‬ ‫عملیات‬ ‫هنگام‬ ‫در‬‫گیری‬.
‫شد‬ ‫خواهد‬ ‫مختل‬ ‫اطالعات‬ ‫به‬ ‫دسترسی‬ ‫سرور‬ ‫خرابی‬ ‫اثر‬ ‫در‬.
‫حجم‬ ‫افزایش‬ ‫در‬ ‫محدودیت‬
MAY 2012
‫دستگاهی‬‫است‬‫که‬‫به‬‫ت‬‫ر‬‫صو‬‫اکی‬‫ر‬‫اشت‬‫در‬‫شبکه‬‫ار‬‫ر‬‫ق‬‫می‬‫گیرد‬.
NAS‫یک‬‫ر‬‫د‬‫شبکه‬‫ای‬‫ر‬‫ب‬‫ان‬‫ر‬‫ب‬‫ر‬‫کا‬‫ایش‬‫ز‬‫اف‬‫ایی‬‫ر‬‫کا‬‫و‬‫استقالل‬‫از‬‫سکو‬‫ا‬‫ر‬‫به‬‫مغان‬‫ر‬‫ا‬‫می‬‫د‬‫ر‬‫آو‬.
‫با‬‫استفاده‬‫از‬NFS‫سیستم‬‫فایلی‬‫شبکه‬‫ای‬‫مختص‬‫محیط‬‫های‬،‫ی‬ ‫یونیکس‬CIFS
‫سیستم‬‫فایلی‬‫مختص‬‫محیط‬‫های‬‫ی‬‫ز‬‫ویندو‬،FTP،HTTP‫و‬‫سایر‬‫تکل‬‫و‬‫پر‬‫ها‬‫با‬
‫ای‬‫ز‬‫اج‬‫شبکه‬‫تباط‬‫ر‬‫ا‬‫ار‬‫ر‬‫برق‬‫می‬‫کند‬.
NAS‫یک‬‫دستگاه‬‫شبکه‬‫ر‬‫محو‬‫است‬‫و‬‫عموما‬‫بخاطر‬‫یکسان‬‫ی‬‫ساز‬‫محل‬‫ذخیره‬‫س‬‫ی‬‫از‬
‫داده‬‫های‬‫ان‬‫ر‬‫ب‬‫ر‬‫کا‬‫در‬‫شبکه‬LAN‫د‬‫ر‬‫مو‬‫استفاده‬‫ار‬‫ر‬‫ق‬‫می‬‫گیرد‬
MAY 2012
‫ایی‬‫ر‬‫کا‬
‫بستر‬ ‫در‬ ‫شدید‬ ‫افیک‬‫ر‬‫ت‬‫وجود‬LAN‫ی‬‫گیر‬‫پشتیبان‬‫عملیات‬‫هنگام‬‫در‬
‫بستر‬ ‫در‬ ‫شدید‬ ‫افیک‬‫ر‬‫ت‬‫وجود‬LAN‫اطالعات‬‫جابجایی‬‫عملیات‬‫هنگام‬ ‫در‬
‫ی‬‫پذیر‬‫انعطاف‬
‫به‬‫نیاز‬Down Time‫د‬‫ر‬‫دا‬
‫های‬‫ت‬‫ر‬‫پو‬ ‫تعداد‬‫مثال‬‫حجم‬ ‫ایش‬‫ز‬‫اف‬‫در‬‫محدودیت‬SCSI‫است‬‫محدود‬
‫هزینه‬
‫ی‬‫ساز‬ ‫ذخیره‬‫فضای‬ ‫ایش‬‫ز‬‫اف‬‫جهت‬(‫د‬‫ر‬‫موا‬‫ی‬ ‫بعض‬‫در‬)‫است‬‫ر‬‫و‬‫سر‬ ‫ایش‬‫ز‬‫اف‬ ‫به‬‫ز‬‫نیا‬
‫اطالعات‬‫به‬ ‫ی‬ ‫دسترس‬ ‫ضریب‬‫بودن‬ ‫پایین‬(Availability)
‫شد‬ ‫خواهد‬‫مختل‬‫اطالعات‬‫به‬‫ی‬ ‫دسترس‬‫ر‬‫و‬‫سر‬ ‫ابی‬‫ر‬‫خ‬‫اثر‬‫در‬.
‫از‬‫استفاده‬RAID‫است‬‫ر‬‫و‬‫سر‬ ‫به‬‫محدود‬.
MAY 2012
SAN‫دیتا‬‫ر‬‫محو‬‫است‬.
SAN‫یک‬‫شبکه‬‫ی‬ ‫اختصاص‬‫با‬‫مدیریت‬‫و‬‫متمرکز‬‫مطمئن‬‫است‬‫که‬‫تباط‬‫ر‬‫ا‬‫بین‬‫های‬‫ر‬‫ا‬‫ز‬‫اب‬
‫ذخیره‬‫ی‬‫ساز‬‫و‬‫یسگرها‬‫و‬‫سر‬‫ا‬‫ر‬‫ار‬‫ر‬‫برق‬‫می‬‫کند‬
SAN‫برخالف‬NAS‫شبکه‬‫ای‬‫است‬‫که‬‫ای‬‫ر‬‫ب‬‫ذخیره‬‫ی‬‫ساز‬‫داده‬‫ها‬‫اختصاص‬‫داده‬
‫شده‬‫است‬،‫جدای‬‫از‬LAN‫مرسوم‬‫است‬.
SAN‫بااستفاده‬‫از‬،‫تر‬‫و‬‫ر‬‫سوئیچ‬‫و‬gateway،‫انتقال‬‫داده‬‫ها‬‫بین‬‫محیط‬‫های‬
‫ناهمگن‬‫ذخیره‬‫ی‬‫ساز‬‫و‬‫ی‬‫ر‬‫و‬‫سر‬‫ا‬‫ر‬‫سهولت‬‫می‬‫بخشد‬.
‫ایجاد‬‫یک‬‫شبکه‬‫دخیره‬‫ی‬‫ساز‬‫نسبتا‬‫ر‬‫دو‬(‫در‬‫حد‬10‫کیلومتر‬)‫با‬SAN‫امکان‬‫پذیر‬‫است‬.
MAY 2012
Iscsi:
‫انتقال‬‫اطالعات‬‫ی‬‫و‬‫ر‬‫بر‬‫بستر‬‫شبکه‬‫انجام‬‫می‬‫شود‬‫حداکثر‬‫نرخ‬‫انتقال‬Gbps1‫است‬
Fiber Channel
‫اتصال‬‫تمامی‬‫ها‬‫ر‬‫و‬‫سر‬‫و‬‫دستگاه‬‫های‬‫ذخیره‬‫ی‬‫ساز‬‫از‬‫طریق‬‫یک‬SAN Switch‫و‬
‫بوسیله‬‫فیبر‬‫ار‬‫ر‬‫برق‬‫می‬‫شود‬.‫حداکثر‬‫نرخ‬‫انتقال‬Gbps10‫است‬.
IFC
‫ترکیبی‬‫از‬Iscsi‫و‬FC‫است‬‫و‬‫محدودیت‬‫های‬‫شبکه‬‫ای‬Iscsi‫با‬FC‫برطرف‬‫می‬‫کند‬
Infiniband
‫همانند‬FC‫است‬‫و‬‫از‬‫فیبر‬‫استفاده‬‫می‬‫کندو‬‫حداکثر‬‫نرخ‬‫انتقال‬‫آنها‬Gbps20
MAY 2012
‫ایی‬‫ر‬‫کا‬
‫ا‬‫ز‬‫مج‬‫بودن‬‫شبکه‬SAN‫و‬‫نتیجه‬‫ر‬‫د‬‫حذف‬‫افیک‬‫ر‬‫ت‬‫شبکه‬LAN‫هنگام‬‫ر‬‫د‬‫پشتیبان‬‫ی‬‫گیر‬‫و‬‫انتقال‬
‫اطالعات‬
‫سرعت‬‫باالی‬‫ی‬ ‫دسترس‬‫به‬‫اطالعات‬‫بدلیل‬‫استفاده‬‫از‬‫کانال‬‫ها‬‫و‬‫دهای‬‫ر‬‫ها‬‫ی‬‫ر‬‫فیبرنو‬
‫انعطاف‬‫ی‬‫پذیر‬
‫امکان‬‫استفاده‬‫از‬‫اطالعات‬‫در‬Platform‫های‬‫مختلف‬
‫نیاز‬‫به‬Down Time‫د‬‫ر‬‫ندا‬.
‫محدودیت‬‫ایش‬‫ز‬‫اف‬‫حجم‬‫وجود‬‫د‬‫ر‬‫ندا‬.
‫ایش‬‫ز‬‫اف‬‫ضریب‬‫ی‬ ‫دسترس‬(Availability)
‫در‬‫اثر‬‫ابی‬‫ر‬‫خ‬‫ر‬‫و‬‫سر‬‫ی‬ ‫دسترس‬‫به‬‫اطالعات‬‫مختل‬‫نخواهد‬‫شد‬.
‫امکان‬‫پیاده‬‫ی‬‫ساز‬‫ی‬‫مجاز‬‫ی‬‫ساز‬‫وجود‬‫د‬‫ر‬‫دا‬.
‫امکان‬‫پشتیبان‬‫ی‬‫گیر‬‫از‬‫اطالعات‬‫به‬‫ت‬‫ر‬‫صو‬Server less‫و‬Lan free Backup
MAY 2012
MAY 2012
SAN NAS
Protocol Iscsi,FC,IFC,Infini band ISCSI,TCP/IP
Speed 1-20 GB 1 GB
Capacity 4 – 324 TB limit
Backup
Lan free Backup,
Server less Backup
Lan Backup ,
Server Backup
Virtualization Yes NO
Cache 4-22 G 1 G
Traffic in LAN NO Yes
MAY 2012
‫ها،دکتر‬ ‫شبکه‬‫احی‬‫ر‬‫ط‬ ‫ل‬‫اصو‬‫نص‬ ‫ات‬‫ر‬‫انتشا‬ ،‫ملکیان‬ ‫احسان‬
‫ه‬‫ر‬‫شما‬ ، ‫شبکه‬ ‫عصر‬ ‫مجله‬117‫،حمید‬‫ی‬‫ساز‬‫ذخیره‬ ‫های‬ ‫سانه‬‫ر‬ ‫بر‬ ‫ی‬‫گذر‬ ‫مقاله‬ ،
‫ر‬‫پو‬ ‫سلمان‬
MAY 2012
MAY 2012

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