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Red Hat secure, open source solutions: SCAP+STIG

#video #security #scap #openscap

@unixmens

به گفته :🔻 عدم توازن درآمد و هزینه، #صنعت_ارتباطات را فرسوده کرده؛ افزایش اخیر نرخ ارز هم هزینه اپراتورها را افزایش داده است
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رئیس هیات مدیره سندیکای صنعت مخابرات ایران در گفت‌وگو با #سیتنا:
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🔹 عدم توازن درآمد و هزینه در صنعت ارتباطات، شبکه‌های ارتباطی را فرسوده و توسعه را مختل کرده است.
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🔹 ترس از تورم آینده باعث شده نرخ ارز در هفته‌های اخیر با جهش مواجه شود که این افزایش نرخ ارز هم هزینه‌های اپراتورها را بیشتر می‌کند.
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هزینه‌های برق، گاز و نگهداری دیتاسنترها در سه سال گذشته بیش از چهار برابر شده، اما درآمدها متناسب با آن رشد نکرده است.
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من در حوزه DevOps فعالیت میکنم و همچنین سالهاست در حوزه پایگاه داده فعالیت میکنم . بالای ۹ سال oracle dba بودم .
به طور میانگین عرض کنم . بالای ۷۰ درصد مشکلات performance مربوط به app ها در سمت پایگاه داده است .
این موضوع در database DevOps هم معنا پیدا کرده .
همچنین از یاد نبریم database storage engine ها و فلسفه اون ها و تفاوت engine ها را .
در هر پایگاه داده هم این مفاهیم به نحوی در معماری اون گنجانده شده .
از یاد نبریم پایگاه داده بدون system design مثل پرنده ای است که پرواز نمیکند .

به طور خلاصه:

واقعیت این است که خیلی از تیم‌ها وقتی درباره DevOps حرف می‌زنند، لایه‌ی داده را به چشم «black box» نگاه می‌کنند؛ در حالی‌که همان‌طور که گفتیم، بیش از ۷۰٪ مشکلات performance معمولاً ریشه در design و behavior پایگاه داده دارد، نه صرفاً در کد یا سرور اپلیکیشن.

چند نکته در ادامه‌ی برای تکمیل بحث:

در واقع Database DevOps یعنی درآوردن پایگاه داده از حاشیه و آوردنش به چرخه‌ی تحویل مستمر — دقیقاً مثل application code.
یعنی پایگاه داده هم باید versioned، testable و deployable باشد (مثلاً با ابزارهایی مثل Liquibase, Flyway, Alembic).
در موردش چندین مقاله نوشتم .

موضوع Storage Engine‌ها — مثل InnoDB، RocksDB، WiredTiger یا حتی ASM در Oracle — در واقع قلب تپنده‌ی رفتار سیستم هستند.
تفاوت در write pattern، buffer management، concurrency control، transaction isolation و logging مستقیماً روی latency و throughput اپ اثر می‌گذارد.


نکته بعدی : System Design برای پایگاه داده همان چیزی است که خیلی‌ها از آن غافل‌اند.
اگر schema design، index strategy، partitioning logic و data lifecycle مدیریت نشود، هیچ tuning یا DevOps pipeline نمی‌تواند نجاتش دهد.

#devops #database #dba #tips

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«وال سفید تنها» (The Loneliest Whale) داستانی واقعی و غم‌انگیز درباره‌ی نهنگی است که در اقیانوس آرام زندگی می‌کند، اما با هیچ نهنگ دیگری نمی‌تواند ارتباط برقرار کند.

ماجرا از دهه‌ی ۱۹۸۰ آغاز شد، زمانی که نیروی دریایی آمریکا با استفاده از میکروفن‌های زیرآبی (هیدروفون) که برای ردیابی زیردریایی‌ها استفاده می‌شد، صدایی ناشناخته از اعماق اقیانوس دریافت کرد. این صدا از نهنگی می‌آمد که فرکانس آوازش ۵۲ هرتز بود — در حالی که نهنگ‌های آبی و نهنگ‌های باله‌ای معمولاً در محدوده‌ی ۱۰ تا ۴۰ هرتز صدا تولید می‌کنند.

این تفاوت فرکانس باعث می‌شد که دیگر نهنگ‌ها صدای او را نشنوند و نتوانند پاسخش را بدهند. از همین رو، پژوهشگران او را “نهنگ ۵۲ هرتز” یا همان وال سفید تنها نامیدند.

در طول سال‌ها، این نهنگ بارها در نقاط مختلف اقیانوس ردیابی شد، همیشه تنها، همیشه در حال حرکت و آواز خواندن با فرکانسی که هیچ نهنگ دیگری پاسخ نمی‌داد. صدایش خاص و منحصربه‌فرد بود — مانند زبانی که فقط خودش می‌فهمید.

با گذشت زمان، او تبدیل به نمادی از تنهایی انسان مدرن شد: موجودی که در جهانی پر از صدا و ارتباطات زندگی می‌کند، اما کسی نیست که واقعاً صدایش را بشنود.

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این داستان، استعاره‌ای زیبا و دردناک از وجود است — از جستجوی معنا، ارتباط و پاسخ، در جهانی که گاه هر صدا در آن بی‌پاسخ می‌ماند.

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