<div id="readability-page-1" class="page"><div><article><section><section><h3 id="category">인프라 / 기초</h3><span><ul><li> akasai
            </li><li>3월 16 화, 2021
                 · 3 min read
            </li></ul></span><section data-v-fc5a9040=""><ul data-v-fc5a9040=""><li data-v-fc5a9040=""><a href="/tag/Webserver/" data-v-fc5a9040="">
        Webserver
      </a></li><li data-v-fc5a9040=""><a href="/tag/WAS/" data-v-fc5a9040="">
        WAS
      </a></li></ul></section></section><ins data-ad-client="ca-pub-7791595479585064" data-ad-slot="1631172523" data-ad-format="auto" data-full-width-responsive="true"></ins><section><article><p><img src="/assets/static/was1.42db587.98086380203b786f68feca1caaf60028.png" width="2560" data-old-src="https://akasai.github.io/what-is-webserver-and-was/data:image/svg+xml,%3csvg fill='none' viewBox='0 0 2560 878' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3e%3cdefs%3e%3cfilter id='__svg-blur-6e26f3845552ea8e4cedfe125bc1c3b0'%3e%3cfeGaussianBlur in='SourceGraphic' stdDeviation='40'/%3e%3c/filter%3e%3c/defs%3e%3cimage x='0' y='0' filter='url(%23__svg-blur-6e26f3845552ea8e4cedfe125bc1c3b0)' width='2560' height='878' xlink:href='data:image/png%3bbase64%2ciVBORw0KGgoAAAANSUhEUgAAAEAAAAAWCAYAAABwvpo0AAAACXBIWXMAABcSAAAXEgFnn9JSAAAJTUlEQVRYw9VXeVBURxrv997MMAPD4YAgVxCQ%2bxDkdsCoOMAAMwhRiTLAAkYF5T48OGSAEaEUFLkUDYMIKN5Go%2bWaSMQ1Xn/EbExi3M2qlTVKshE3VWqtxt6vHwNBBQ80bm3X/Or7XndPv/5%2b39H9EHqqcRDDSl1EIaStTxXRocweNIM5SntSxwWT0EojfRilkBnFoP9lMxb9/n43G6Q1bIg35kUZYjRLgkYZoTWiQKaZ68YoBe70OqElNccZOrnkR70Vw8eP4yCR/oDxjjZCHRAmoTMmu28oCu5uXxfRVpYdVEjGencuoBH1inviUNwhKiECbJBQNDWNMyulF01P/Ilj74xnomfcPiXAlPogbMB6jBnEof9A68GgiWZcVvVy0iKeHg/wjJOKqs50x/3288VMfLA5uoyMf3kkiaPFe9XNCHiIw9fXvAxpGeuaL1lEi39IQhE/FyLJdw20/yE14116gDclsUvX2%2bP%2bRCPB4F%2bbUt9e%2bHeVG7OES/wE0sYCo7/2NBrhszt88acdcZcQEhqTsYQY97GHZAESsfLfziuZo0KbqFrdAHU53%2b9CCe1/rZQS9xfRgXeL6aC%2bZr7rmZb5vNLydORB5jdnUZS9Ge8PNT7MX8C6NVYidFwUracK8dPesXqhQdGxDca7arNFPYtn8%2b1g58jxHZrS4lFjJAFekcAInujC00SGfeMdnc7ruATuETrItgudojr4HvKmaL3Qogw0ka0Py2k0yYT7VqKgMMnALjJQx2R4X0O%2boXuewiD2tRc3GJbqDkhbF8qjF6juAFLyrAGWpAYB7Abnhao8aKctsZR3g5zyapAN5KlGvkoLLzs1JAGUVPkZZTstnvU6xXA8SeTTNBKT4g8I0OIimfE42kKoTfnDcyB5LcXh%2bNI0xxX0EIBwzCWHDQYK6YHiDNFkIaBoOx1Eu%2bojxt6A4tjqIsYhdtq4Z1zu1zgbTd4UPlAk68dOwgjNCPAuMQxI8AcQBwQASATqcbW4M6GMeWicRJwmpiiaP3yBtdXVaE1lJaurKte8mXB0q5TwvOvlZt4NUQA5qcwouCWOHfOsk401AgwB3gC38LJee4gE83lNN955gPGIpR1jPKRbH8fj15eeMSN6h8SbSikopDOz86j0nDx6SXoW69iyioqByb9meaBHC93pb1TWdM1FRK/u4FDE%2bZwnD/andUrPxRjZp/mz/WB0B%2bAu4DvAPUC8pp/xa5pN5KgGFyvahiRBXP5Rds1w5SkbMD4CZBpIBZCwXFrak0zGTN2CKW2R%2beCeqJj2epYUn9PYauqRv83XXv9FaGr5XxzQKGSVqVTsf6uqq8aWFqzXy2YxGiODfZqiMOR7iENNsBY8ZwHOuWwM5bB14CVSYJCEJyKBEKA8NSes/HSCtKx3dkTpKRlI2fyCo7zD7jkoL6WDLlK00usqitg99X2DtKo/z5trgrEZxILwjqn1vl8sHTceCJX7LVCW2%2bZm5zpABNgVrCp0LldV6JH/lKsgBW7niw3608Qhl6pcAxovciWqLm0XGNPh8ZEhHCIj3Xf1gAbzwQcw9hJgy5T6SCMgYSnkfCKgCp7fHagBkfRLRgAN4BbHt7E1ZXznD9SkrVd56am7RYsz9rN5vDDj4KhHTOd5ieWur7xTwXjuTWtX1R1LR/wvK%2bfeprlx51IKVvRkZOVeSs/OuwAkdJD5i5ZlopVFJZA7y%2bxm4EV2%2bPsy02u13yK8ei%2bzHRw9j%2bGiXJinAJDdzwG8R45hwDJA3jACWgGHwXgZ4CzoV3y3RGOQYs348wmIb6M0chwQUFqsUKtAn1cSr05eHa9OBFkIiC1OaAstUahXAGbBeEhJPDzHt8WUJnzI5vqPDQu1H12wb7q92c/8lsg1%2bpajR8RdKyd5jSJJsrhgRVhWTn5YRm5BZEZO/nQyX5G4ECkrVAjtqM7xUitXfr2zOebAiXPocvdHAnKXnsXloWhNxfXVYAY5gkiqUQzlZTzdmvWG16ZIERh4HwBel4lBfgroZHOyIYoBUqhBAkYiAoxhJRhDg76tRNHWBXIHGLwNsB1QCSB93YBNQFI7yA5ABZC1q0TRPm2oEPYh27vVTtv6c51S%2bkSOdbfEXvqjEZ%2b/qmhA4R/vn4nOYBz%2b57038FcI/3iQDzuiFmtroWhlMv%2b5uRu0O05z3ssjwbgeEgkD0SAn9wQU0BSDhkXKC9MASJgABJgUx6stwOsT4XlScYLaHHTwuHomzNOHPjMYty1JUOsVL%2bi0Jf9Txz6w2Dy3X53vgK1wF7L5Zb5LwC1Tl/U/2buw1%2bK1iSlMZlYuvSw7j4Aq0BivrIAaYHnkhhU6dK/s/WM7luLPkfIfB3UiYcwVLhheUAP4wyu/oZ8FG66etRFm3o1yARQ4bfCwCRjszfZvimCLi09jFAMGT55cF04igByNglEjQKEetRA%2bvw0ce7XR/WbrZNevbHv/IW6I7btXJccfDDsb0WULf1bNnNX7emc9udWRfNYYUgCoAaRC/zrACkAyFLx86FuqGVsLaAOs%2bX2NZwkAjw6PAAoigAIPU%2bBhAOgg4ZkuYdFGKZPaqcyQLvaEyQg%2baZczred6ccgXuCT07IPK967i5qRf8QbF9ZN1UV86D75jedCx53xff3wToY8eMjHHOmmIAOb7fXyafHfq8NETn9OEAJLPGj0ejFkGxnWDXgpoAaRBDciDvj0wlgAoBH0XoHr4Gq/Tgq2bUIzLh%2bwepPabvee4tP4z2Xc3PrHv6/8c2HYOdzdc/u3E3msP28pv4JWyS/fypedIIUdXOjDKkpx%2b3QiQo2F3fAO3jVJy5zcEo/VBTgEINOFuqIkSB8/6SA70TQCd/6I68DJN6tiKZPaNLAEyl9aPJZateLFs%2b/1u9We4ae2Rxy01J/DWDb14Vcon95dIzuNUySeHydw/RZ2g0maefDPX3pfxoi98CzzdXtf4wRYbsJ8lID3mrNkcn31Xwxy2Yv8Jax6KLatxkPUGHOLa%2bijSoxPHivfeDJycbkHmzg/cSb0Bw5%2bIgKGU0EialfWyoa/BQfmiY3AsLTn4LFuLEqX7XWPFx/qCJm7FrvrKR1OMKx/7WtQ9lrh04uiA5gVkTp78Nj1QL06h//uWGnYGZcy4OaBLv2VvqVKflqlRvofuhLi2Yy/TtQ89J9RhH6uaFvaEiMKs5/9ei1FS8IER1/wva2hdOyiYaC0AAAAASUVORK5CYII=' /%3e%3c/svg%3e" data-srcset="/assets/static/was1.82a2fbd.98086380203b786f68feca1caaf60028.png 480w, /assets/static/was1.cbab2cf.98086380203b786f68feca1caaf60028.png 1024w, /assets/static/was1.2665e34.98086380203b786f68feca1caaf60028.png 1920w, /assets/static/was1.42db587.98086380203b786f68feca1caaf60028.png 2560w" data-src="/assets/static/was1.42db587.98086380203b786f68feca1caaf60028.png" srcset="/assets/static/was1.82a2fbd.98086380203b786f68feca1caaf60028.png 480w, /assets/static/was1.cbab2cf.98086380203b786f68feca1caaf60028.png 1024w, /assets/static/was1.2665e34.98086380203b786f68feca1caaf60028.png 1920w, /assets/static/was1.42db587.98086380203b786f68feca1caaf60028.png 2560w"></p>
<p>자주 헷갈리는 개념인 <code>Web Server</code>와 <code>WAS</code>의 차이점을 알아보았습니다.</p>
<hr>
<h2 id="web-server">Web Server</h2>
<p><code>Server의 문지기</code></p>
<p>Http요청이 들어오면 <code>WAS</code>로부터 해석된 HTML문서와 같은 웹페이지를 반환하는 역할을 합니다.</p>
<p><strong>주로 정적(Static)인 데이터를 처리합니다.</strong></p>
<h3 id="종류">종류</h3>
<p>Apache, IIS, NginX</p>
<h3 id="관점">관점</h3>
<p>웹서버는 관점에 따라 다르게 해석될 수 있습니다.</p>
<ol>
<li><strong>H/W 측면</strong>: 실제 물리적인 서버 장비를 의미합니다.</li>
<li><strong>S/W 측면</strong>: 물리적인 서버에 설치된 프로그램을 의미합니다.</li>
</ol>
<hr>
<h2 id="was-web-application-server">WAS (Web Application Server)</h2>
<p><strong>웹서버와 반대로 동적(Dynamic)인 데이터를 처리합니다.</strong></p>
<p>실제로 Application이 동작하는 부분으로 대게 <code>웹서버</code>와는 구분이 됩니다.</p>
<p>실질적인 <strong>비즈니스 로직</strong>과 <strong>DB 작업</strong>들이 수행되는 곳입니다.</p>
<h3 id="종류-1">종류</h3>
<p>Tomcat, Web logic, Jeus</p>
<hr>
<h2 id="web-server와-was를-분리하는-이유">Web Server와 WAS를 분리하는 이유</h2>
<p><img src="/assets/static/was2.0f43f28.3f6daf7b62e38a9b5e58342fb51cfae0.png" width="773" data-old-src="https://akasai.github.io/what-is-webserver-and-was/data:image/svg+xml,%3csvg fill='none' viewBox='0 0 773 378' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3e%3cdefs%3e%3cfilter id='__svg-blur-599f00e5bb92c30ee8370a2c858aaa55'%3e%3cfeGaussianBlur in='SourceGraphic' stdDeviation='40'/%3e%3c/filter%3e%3c/defs%3e%3cimage x='0' y='0' filter='url(%23__svg-blur-599f00e5bb92c30ee8370a2c858aaa55)' width='773' height='378' xlink:href='data:image/png%3bbase64%2ciVBORw0KGgoAAAANSUhEUgAAAEAAAAAfCAIAAADY01yrAAAACXBIWXMAAAsSAAALEgHS3X78AAAFuklEQVRYw82Ya08iSRSG%2bf//xMy30dXN6AYmzK6u6BJQUIabAnIR6AYaBEWYfbpfOOlVjDhmWE9IpbqoqnN7z6U78mMj5Hme4zj9/qDf7w99GrHCvNfrdbvd99wc2ZgC8/mcyePjo%2bO63W4HJXhkETU0%2bbgKzGazaDQ6mUyYu073YP9LNBa7zH3Xv/V63XXdj%2bsBpO90OoeHh9j%2bx9LUDKxrAxBqtVpg6f9RYDQa9QK6u7u7v7/HzIPBQOBGYqR0A7q5udG6/5f/b9%2b2gSV2MiFIptPpRhWAH%2bD2uc7n5XLp5OQ0k8l43hADIxZ/ITr/NhoNxGX/w8PD9BkJ/WiO/niDcRMKiCtmw/taqVUqyWQynT4fjyfyTKVSEVRQAP%2b8aovxeMwEPyi%2bf7kHYFkul2u1mq%2bJ0/37%2bLhYLKZTqXyhJAUSiYTEQoF1LmQnLmIidK1px8jPmV/wxbpYCymBS7FYqFSqpVKx0WyBaRTI5XKYs9lsaufDC2TRLLXlWyactb9WHgdsMHqzApwEqQYJsIt8A2%2bA/VhkVFgzb7fbCHF9fc0EZsSDH8KDAdqitgWxcqjkNiBBHCF9ScPgnMgLoiuYeR6SRN5aj5BJCfHV0oMopVKJ/UCILGTemwTJyqyrQOfRonmRcAPDIygbVEO0EubOzZE149WvoG8ML0yYz%2bfRGW9sbW0J39327fbn7d29vWTqTJeTBm5vb9nWWxJiYXLkZs6pT58%2bYQjd2Wo1d7Y/F4qLR/AZQTKlsCcUVhQJkF4SPDE8j4sDkwVpynH2X11dEeUgoVAo6KDyEuPyfj%2bVsR8W9hdzcGhwJbmhniEWQAJVPfoeQDL1VZAXkI/pwHHw4DpZxdg/kV5QZhiORpPJmJ8XIFQXIn02mw1b1w0MK%2bvqUQkHWRHacIUVUIMNiAsUFS2QesF%2bIB5z3wOq4UucTA1/6CohDH8rA9pAVch/j8e/JRInoyC%2b4XoVEEFstpgF9LgkPZpRlLvkZ1UYdJDtbfPzsxGn2/kzHt/d/T2dTl%2bVS4d/HX2Lx/9JJlE2lUop2KV6mFiBmUT0s8fjtFarXviUI8co3Emj7KScAfH1%2b00sgujojxOYvHoqgnmG3oBAUnJ0uk6z0YQxaMBBgr4gO/sviZmSoNNp02BeXFwmEseXubylIDAKitZRwFKQIE1esgz7igKAbORHDXHj%2bwu73gVB5AatFcQtlptXVjQ/%2bd%2bNYYybGPGZWjosgn/wA3PMibbPPQlZAydXyzSsozZWE2v2PE8zcGE9woHpKrJ4skjVyhNDCriQFTJGZBWParVKJsVGgAFPyo2LawNAs4iBlCqUeXQnj8igq2QOb0FDtYmacfO6dQDJwpl0HUAjB9mTHIo08Xh80SwMvUazWalWe8tuB6BibKVR1V0YyfDK0VghrNv9w/1sKcBahSwskB8wy7SzMrE%2bKWS0d4r4WCwm29%2b2mn8cHBweHV1XqjqOAmrjNLIZnZVG1Rrt7OyEC9nub9tWyHDsm3shBa6VOdVBv34FI0JoBAD4HQshHyOnwk1b2L3hSBWWbKdQhD7hBgn/WGZ/mwfCLRdc1c8ZHHtBHSQKgo8Ofq9GBCMNI04Q1heFzHXDhUz32AuGyarSxrrYrSxkP%2bMBQw4XYQDMo/ViIb//ZT/2Ne4FGMNUp6en4qeXnvkLFG7%2brKrKk%2bEXa222JG7H3/VGhmTUKT9/j8e1asXPOYVC13GlAAlUUViv163Av3SVYlfCYfj1X47f9U5srQSlMBqNpdJnJ4nEWSYrcyp8hVRLIy%2bRehaDzea%2bSqjvXbyaLJszSK/nEPNOQHrHh5yALCT0bsWc8aWK%2bWu/C4XRaS2xWRGx8AA96fPqoc2oinp6Nf2gX%2baw697enqR3nU4mmz07P2%2b3F9FPu/qez6Mb%2bjZKrV0mSjdxfJzJZOqNppxgeexDK6AYBU76kqWvDGrI3vNhFPoXsDGaP5Ta27kAAAAASUVORK5CYII=' /%3e%3c/svg%3e" data-srcset="/assets/static/was2.0f43f28.3f6daf7b62e38a9b5e58342fb51cfae0.png 773w" data-src="/assets/static/was2.0f43f28.3f6daf7b62e38a9b5e58342fb51cfae0.png" srcset="/assets/static/was2.0f43f28.3f6daf7b62e38a9b5e58342fb51cfae0.png 773w"></p>
<h3 id="web-server의-존재-이유">Web Server의 존재 이유</h3>
<p>웹서버는 정적인 데이터를 주로 처리하는 역할을 합니다.</p>
<p>요청에 좀 더 빠른 응답을 할 수 있으며, Application의 부하를 줄일 수 있습니다.</p>
<h3 id="was의-존재-이유">WAS의 존재 이유</h3>
<p>대부분의 웹페이지는 정적/동적인 데이터가 모두 존재합니다.</p>
<p><code>WAS</code>는 실질적인 비즈니스 로직이 동작하며 동적인 데이터를 다루는데 이것을 모두 <code>웹서버</code>에서 처리하기엔 자원 낭비가 심합니다.</p>
<p>따라서 Application이 동작하고 동적인 데이터를 다루면서 효율적인 자원관리를 할 수 있습니다.</p>
<h3 id="두-서버의-분리-이유">두 서버의 분리 이유</h3>
<ol>
<li>
<p>서버 부하 방지</p>
<p>모든 데이터(동적, 정적)를 한 서버에서 모두 처리하기에는 H/W 자원은 한정되어 있습니다.</p>
<p>기능을 분리하여 관리하는 측면이 좀 더 빠른 응답을 제공할 수 있습니다.</p>
</li>
<li>
<p>보안 강화</p>
<p>외부로부터의 접근을 막아 서버 환경에 대한 노출을 방지할 수 있습니다.</p>
</li>
<li>
<p>다양한 WAS 환경 제공</p>
<p>웹서버가 로드밸런서 역할을 하여 다양한 <code>WAS</code>와 연결할 수 있습니다.</p>
<p>성격이 다른 Application들을 동시에 제공할 수 있습니다.</p>
</li>
</ol>
<p><code>WAS</code>는 정적/동적인 데이터를 모두 다룰 수 있는 서버입니다. 또한 눈에 띄는 성능저하도 발생하지 않기 때문에 <code>웹서버</code>가 없어도 페이지를 제공하는 데 어려움이 없습니다.</p>
<p>하지만 다양한 환경의 Application 활용을 위해 로드밸런서로서의 역할은 큰 도움이 됩니다.</p>
<hr>
<h2 id="web-server-architecture">Web Server Architecture</h2>
<ol>
<li>
<p>Client -&gt; Webserver + DB</p>
<p><img src="/assets/static/was3.d042d20.3f50965394ee3615a85c2aeefa32f47d.png" width="400" data-old-src="https://akasai.github.io/what-is-webserver-and-was/data:image/svg+xml,%3csvg fill='none' viewBox='0 0 400 104' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3e%3cdefs%3e%3cfilter id='__svg-blur-c11d3ef6645883540fe6e3ee60184165'%3e%3cfeGaussianBlur in='SourceGraphic' stdDeviation='40'/%3e%3c/filter%3e%3c/defs%3e%3cimage x='0' y='0' filter='url(%23__svg-blur-c11d3ef6645883540fe6e3ee60184165)' width='400' height='104' xlink:href='data:image/png%3bbase64%2ciVBORw0KGgoAAAANSUhEUgAAAEAAAAARCAIAAADi2T3bAAAACXBIWXMAAAsSAAALEgHS3X78AAAEQElEQVRIx9VW%2bXPaRhTmX28nk04TT5JebhpibFLwNBjHJiRAMDcYzGGOYO5DYAnQBQiJG4T7pMUUg6cT4IdO3zCS2H3Xt/vet6u421lms9ndfycKnudbrVZ7KwFDMN8awHg8Xg7NcRyBV8tlrJDLs2wTpgSBr9cbDMMI3V672azVG6C0HH00GikIghAEobuVQPbVapWiqC32od/vl8tllmV7vV4XEuj1hA73%2by/Pnz579cOPexzfCfvdqVT2wubwuS%2bsLp/26MDuvhxORIHnUXSwrVQqCvAliuIum4hh2GAw2LTkbm9vAf8Kcqfl7NVPrw9U6uFAMHw40f%2blN1ntQe/F8xc/P/3%2bO7c/JOnL2SIrgPEAwGw297bsdLYkj6ZCkiQs56ZtU6/Xl32iHIJ%2b3%2bHBW0BQLpWwKs63mpf%2bII5XwtFYOhaNxhILAIvocwDSqPQf3lPkazqdIrXlsOJUmoWHPDsPDyUEZbAC9d9lMplA6S7vPHLF0GQ4FIolbiAEGmdb3GQiZTLq95vtNlJ90MRSBiQlcC2GpqFBBmPQnuA1SpyrzTLJeDKVqRNVBtnfx4OyQa4AwKY7AELT9ErpIgwdriNwHE02%2bE6bYekGRUM5hcKhbn%2b4lvw9gFQ88sVmVf2pcdidHo83mYyfGox2rx%2bmqoWs0%2bYkqbrLbilgxWDgKpPLeT3eS6/nUHXY6U1Ap1arAVEAhm/peyAMIB%2brLKu1KuNJf426XTbVO63D43dbP52cW5Lxq/dnxpFcEetEIQFo0vTLvT2z%2bfOxVvNi7%2bWBRn1i%2bKhWHbHdKVZIe/1BgedsF%2bfKozdPnjzT6o%2bNJodBrzn9aOj2JQA4DuVAAK81v0GAOgCGTqfT6/Vr3CV9D3qcUqnU647fqdUWi/lQrb6O31jNn9J57FG%2bkXtgMiqUMZpharVGuVioEHghn0%2blc5LL6TieiOcKJQY2k6FukjcEBWTMt5skVsGE3gCV0EYsNC9uln2U/SAiVq1A8WRyBa7F9ofDfL6QzWbanPAoWT%2bk0Q25fMFCmzYxRITCWwewUlHQh4PBsC333uxuxrF0m1%2bFoUCEM5XpRUQUI6KBKQr2z6xMPqK4UJzz1dY0KmV4HwIG81%2bTp3pd5DoGB9cHs33a5wIhvy%2bY8LgckfCVy2lTvVGmy4ScsLhYi50OMrQScBhvwUJwkEEzICcogVgg0qYbAbdNe6R5bzRVS/lz/YnJZI9Fr7%2bYDPu//ar8420RJ6WE73cASlcBK4F6awsBQzjMcRzf6CqBNOEYzmQyyA9QKlxmfHb76/39z0bTmU63rzwKBwK1OhkJRlwOVzabDoXDPrvpMpLo8h1oV7AC6isWiwowbm4rKPbWGwgYwBzuZOAKnjTVKJbKXKdD3FYJog6ECxc2hgVqqcE33JioRq1BUkgfRIItCIr//XV6trPsgnydndBz0d8r8/LvgfwNDwIPoF08fe8AAAAASUVORK5CYII=' /%3e%3c/svg%3e" data-srcset="/assets/static/was3.d042d20.3f50965394ee3615a85c2aeefa32f47d.png 400w" data-src="/assets/static/was3.d042d20.3f50965394ee3615a85c2aeefa32f47d.png" srcset="/assets/static/was3.d042d20.3f50965394ee3615a85c2aeefa32f47d.png 400w"></p>
</li>
<li>
<p>Client -&gt; WAS -&gt; DB</p>
<p><img src="/assets/static/was4.c98a7a4.b1b34aeb5cc6f18d227d79d78ce86d15.png" width="614" data-old-src="https://akasai.github.io/what-is-webserver-and-was/data:image/svg+xml,%3csvg fill='none' viewBox='0 0 614 82' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3e%3cdefs%3e%3cfilter id='__svg-blur-3d203d7d8cd7d1a0d27c2dd29162b07f'%3e%3cfeGaussianBlur in='SourceGraphic' stdDeviation='40'/%3e%3c/filter%3e%3c/defs%3e%3cimage x='0' y='0' filter='url(%23__svg-blur-3d203d7d8cd7d1a0d27c2dd29162b07f)' width='614' height='82' xlink:href='data:image/png%3bbase64%2ciVBORw0KGgoAAAANSUhEUgAAAEAAAAAJCAIAAAANXL0tAAAACXBIWXMAAAsSAAALEgHS3X78AAAC4UlEQVQ4y5VV%2b0/aUBTmr3dbzGKQmehMtsCYUTc2Ex%2bbj7GAuB9kPKLjYS3PFlqKFOkT6MN97QXWYV3Y98PJ7bn3nud3bgO1xVCtVnu93sMj2LYN2e/3aZom5%2br1Osdx7Xa70Whg3ZwCnzBCTOHTMIwHP4zH49r/IEAiWASIwPewaZoMw8ySGenq%2bXkinckrsqzrOt/hpYHU63Z7opO/ZVmQd3d3pBxeg2SNzFVVXTAkWAsQi/b0vu1iZhHLmQuUjRyew2g0YlmWZAKpSOKz50svVlZvb4qxT7Gjk9Od6Lvl5Ze/iiXsksIjelEUn0pA07S5SJxY7b8U5AMeA/UK1WRb/YHcF8VOR3BMtJhSscC2eTgzTUtTZUHoInCU2ZubNQVCAVUmSnd/531kaXkFdOE4PpvPF6%2bvLn9mavXarANIADQDWxCr7sFwOKxUKpDEi65r2Uwa5LwuFHr3En1TKJTLxcLNj%2bT3bl8mJQtEIuHNjY3Xm%2bvB0Pqbt2FZuk%2blLkqFq73Ph%2buvgtHt2N7HWDgSRm0r9G2j2WxNgVJBIpTd3d1UKjULDpAlSVWUkWGMhxrEaDQcG8ak1W4JcIuiKEEQYIRzgQWU6XR6a2trViZB6Jwd70ej0dVQKH15Gfuwnby4WAuuhYIrfG%2baAFUuoVSlUqlYLOdzecO0WIa5pahqpX6Vy1YbTItt0TRl2g6FwBbThZdLUCITb9N1VTr%2bcrR/cHh2enz49SSRiDdZzntAdOFLISSDVkw6oKm5bLbeaOQyuYGkDDUZZFEUpcOx4kBxE/DMgJf3j98ZSC%2bFvEDHyRDDFKEW1vFvp0cH%2b2fxeCKRSCbPyxTt%2bHMp550BcoWAbKEWvjPw4PBzonAnczoDtt9c%2bgId8E0AjjHEj%2bbbdvpkO7vyQLIs21uObreLl9e3AzzPy7I8t/UUcCbALAa8of/4D8AlDsxdYV2JtMFwlv2jhwZRPhUfEkYTcGbBwH4DVIlIwH%2bBx3YAAAAASUVORK5CYII=' /%3e%3c/svg%3e" data-srcset="/assets/static/was4.c98a7a4.b1b34aeb5cc6f18d227d79d78ce86d15.png 614w" data-src="/assets/static/was4.c98a7a4.b1b34aeb5cc6f18d227d79d78ce86d15.png" srcset="/assets/static/was4.c98a7a4.b1b34aeb5cc6f18d227d79d78ce86d15.png 614w"></p>
</li>
<li>
<p>Client -&gt; Webserver -&gt; WAS -&gt; DB</p>
<p><img src="/assets/static/was5.a0d7643.e3e525a4a356151493b9467fbcb7c619.png" width="640" data-old-src="https://akasai.github.io/what-is-webserver-and-was/data:image/svg+xml,%3csvg fill='none' viewBox='0 0 640 63' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'%3e%3cdefs%3e%3cfilter id='__svg-blur-de0b6ef6ae253180f27725a037af034d'%3e%3cfeGaussianBlur in='SourceGraphic' stdDeviation='40'/%3e%3c/filter%3e%3c/defs%3e%3cimage x='0' y='0' filter='url(%23__svg-blur-de0b6ef6ae253180f27725a037af034d)' width='640' height='63' xlink:href='data:image/png%3bbase64%2ciVBORw0KGgoAAAANSUhEUgAAAEAAAAAGCAIAAAD8Cg/4AAAACXBIWXMAAAsSAAALEgHS3X78AAAB/ElEQVQ4y31Ta3OiQBD0//%2bcS3J3RS5CYlWsigkiUoUkRDEChvfLB8Iq17Jkz9Mi82mZ7Z7p2Wk6URRVVXU4HKqLoEkAiqI4zSdJUpYlPc/nhsB3h7LyMhQLsqdJ4M/KxnG82%2b2qb8P3fVYWgTMatYGZto7ve7OpLo3H7/qrMfuIwkDXFN0wTMuavr8FYZqmyXq9RjnIIoSgqK7r%2b/2elnCWVr/f53l%2bMBhs8oINADUAQ3RRx2Qy2W639HadJdJIlkeSoiiO6zI1juOsViuA8zxHfcuylsslu0VekZ/ve7zt%2biwZhmEnTWJJEjnu9831da/3aJoLefh0Jwjc7R/x5Xn28ZnEMdRkWYZR0ABFVVWlUkLfm84Mz/NwZduW43yyZmgPcPoVoiiyAVZZcstxfJcX%2bDtVe63VHFdn27brutgVZKGdpmmLxeJ0gNHwSXjg55aDTzxgs4EoDBvQoQm2R8pExUsL0UwU%2bL9urrrd%2b4mq/rz6IY3GbRYC5dJCpN4j%2bwyC4HsLAQ0Gqv5nIQxdEkIXTX3CPhHoivc4%2b0OQweuSssTtLt%2bBRciR2dDrxgCcUjabDVgUwKKsgx4AwABfb3hsBwciw0zYyDspAADEd%2bBvbMpsCaz17Pnp9PArWPAJMDX7XwXksbTL3w5GamuEPJwJQWcUtDbbAyw801/lQUE5X%2bbmBgAAAABJRU5ErkJggg==' /%3e%3c/svg%3e" data-srcset="/assets/static/was5.a0d7643.e3e525a4a356151493b9467fbcb7c619.png 640w" data-src="/assets/static/was5.a0d7643.e3e525a4a356151493b9467fbcb7c619.png" srcset="/assets/static/was5.a0d7643.e3e525a4a356151493b9467fbcb7c619.png 640w">  </p>
</li>
</ol>
<hr>
<h2 id="reference">Reference</h2>
<span>
<p><a href="https://gmlwjd9405.github.io/2018/10/27/webserver-vs-was.html" target="_blank" rel="nofollow noopener noreferrer">[Web] Web Server와 WAS의 차이와 웹 서비스 구조</a></p>
<p><a href="https://jeong-pro.tistory.com/84" target="_blank" rel="nofollow noopener noreferrer">WAS 와 웹 서버 차이 (WAS,Web Server) 그리고 아파치, 톰캣</a></p>
</span>
</article></section><ins data-ad-client="ca-pub-7791595479585064" data-ad-slot="6759499833" data-ad-format="auto" data-full-width-responsive="true"></ins></section></article></div></div>

devlog.akasai

akasai

![](../img/was1.png)
자주 헷갈리는 개념인 `Web Server`와 `WAS`의 차이점을 알아보았습니다.
***
## Web Server
`Server의 문지기`
Http요청이 들어오면 `WAS`로부터 해석된 HTML문서와 같은 웹페이지를 반환하는 역할을 합니다.
**주로 정적(Static)인 데이터를 처리합니다.**
### 종류
Apache, IIS, NginX
### 관점
웹서버는 관점에 따라 다르게 해석될 수 있습니다.
1. **H/W 측면**: 실제 물리적인 서버 장비를 의미합니다.
2. **S/W 측면**: 물리적인 서버에 설치된 프로그램을 의미합니다.
***
## WAS (Web Application Server)
**웹서버와 반대로 동적(Dynamic)인 데이터를 처리합니다.**
실제로 Application이 동작하는 부분으로 대게 `웹서버`와는 구분이 됩니다.
실질적인 **비즈니스 로직**과 **DB 작업**들이 수행되는 곳입니다.
### 종류
Tomcat, Web logic, Jeus
***
## Web Server와 WAS를 분리하는 이유
![](../img/was2.png)
### Web Server의 존재 이유
웹서버는 정적인 데이터를 주로 처리하는 역할을 합니다.
요청에 좀 더 빠른 응답을 할 수 있으며, Application의 부하를 줄일 수 있습니다.
### WAS의 존재 이유
대부분의 웹페이지는 정적/동적인 데이터가 모두 존재합니다.
`WAS`는 실질적인 비즈니스 로직이 동작하며 동적인 데이터를 다루는데 이것을 모두 `웹서버`에서 처리하기엔 자원 낭비가 심합니다.
따라서 Application이 동작하고 동적인 데이터를 다루면서 효율적인 자원관리를 할 수 있습니다.
### 두 서버의 분리 이유
1. 서버 부하 방지
   모든 데이터(동적, 정적)를 한 서버에서 모두 처리하기에는 H/W 자원은 한정되어 있습니다.
   기능을 분리하여 관리하는 측면이 좀 더 빠른 응답을 제공할 수 있습니다.
2. 보안 강화
   외부로부터의 접근을 막아 서버 환경에 대한 노출을 방지할 수 있습니다.
3. 다양한 WAS 환경 제공
   웹서버가 로드밸런서 역할을 하여 다양한 `WAS`와 연결할 수 있습니다.
   성격이 다른 Application들을 동시에 제공할 수 있습니다.
`WAS`는 정적/동적인 데이터를 모두 다룰 수 있는 서버입니다. 또한 눈에 띄는 성능저하도 발생하지 않기 때문에 `웹서버`가 없어도 페이지를 제공하는 데 어려움이 없습니다.
하지만 다양한 환경의 Application 활용을 위해 로드밸런서로서의 역할은 큰 도움이 됩니다.
***
## Web Server Architecture
1. Client -> Webserver + DB
   
   ![](../img/was3.png)
   
2. Client -> WAS -> DB
   ![](../img/was4.png)
3. Client -> Webserver -> WAS -> DB
   ![](../img/was5.png)  
*** 
## Reference
[[Web] Web Server와 WAS의 차이와 웹 서비스 구조](https://gmlwjd9405.github.io/2018/10/27/webserver-vs-was.html)
[WAS 와 웹 서버 차이 (WAS,Web Server) 그리고 아파치, 톰캣](https://jeong-pro.tistory.com/84)

Web Server와 WAS

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